Black and blue: Ford Escort RS Cosworth vs Subaru Impreza P1

By Simon Hucknall

| 26 Apr 2022

Classic & Sports Car - Black & Blue: Ford Escort RS Cosworth vs Subaru Impreza P1

Ford and Subaru’s works rally teams enjoyed great World Rally Championship success in the 1990s and noughties, and were responsible for creating two of the wildest and most potent turbocharged road cars on the market.

But they appeared in showrooms for very different reasons.

Even today, Ford Escorts from the ’60s and ’70s are competitive rally cars

Whatever your allegiance to a particular manufacturer in the world of rallying, you’d have to be an anti-Ford diehard to deny the success of the Escort during the 1970s and early ’80s.

The works RS 1800 roundly trounced its opposition until the all-wheel-drive might of Audi’s quattro became an unassailable obstacle to rivals with only one driven axle.

But that winning streak, while it lasted, allied to the then mainstream popularity of the sport, made a blue-chip business case for production-car spin-offs such as the Mexico, RS 2000 and RS 1800. Within a few years, would-be Björn Waldegårds were everywhere on British roads.

Apart from some additional gauges, the Ford Escort RS Cosworth’s interior is largely that of a regular Mk5 Escort

But nothing lasts for ever, and coincident with the launch of an all-new front-wheel-drive Escort platform in 1980, Ford’s works rally team instead started to focus its attention on the Sierra RS Cosworth and mid-engined RS 200.

It wasn’t until the end of the decade that, with a new Mk5 production car imminent, Ford turned again to the Escort as both a potential WRC contender and a high-performance road car.

Only 1000 Subaru Impreza P1s were built, and each was given a commemorative plaque

At around the same time, David Richards’ Prodrive group had become the de facto works team for Subaru, rapidly scoring rally successes initially with the Legacy and then, from 1995 onwards, the more compact and agile Impreza.

Three drivers’ titles and three manufacturers’ titles followed, and that exposure spawned a voracious appetite among enthusiasts for more hardcore versions of the already quick Impreza Turbo and later WRX production models.

Evans (left) has owned his immaculate, all-original Ford Escort RS Cosworth for six years; Fuller bought his Subaru Impreza P1 new in 2000

What you see here, in the Brands Hatch pitlane, are the road cars that were developed with Ford and Subaru works teams’ expertise: the Escort RS Cosworth and the Impreza P1.

Both are increasingly rare (in unmodified form, at least), both have the requisite all-wheel-drive system and each has a turbocharged four-cylinder engine of 2-litre capacity, along with five manual gears.

But while there’s parity in their core specifications, their respective routes to market were fundamentally different.

Peter Stevens, designer of the McLaren F1, penned the Subaru Impreza P1’s spoiler

“In the late 1990s there were many performance Imprezas being brought into the UK from Japan as ‘grey’ imports,” Prodrive chairman David Richards recalls.

“At the time, we were working with International Motors [Subaru’s UK importer], providing a range of performance upgrades for the Impreza Turbo.”

The Subaru Impreza’s booted shape became a noughties icon

Richards adds: “Together, we saw an opportunity to capitalise on the obvious demand that there was in the UK for the ultimate Impreza and conceived the P1, which, unlike all of the imported cars, would have European whole vehicle type approval and so could be sold through the main dealer network.

“Our USP was that the Impreza P1 was specifically developed for UK roads, which none of the grey-import cars were.”

The Subaru Impreza P1 was built to be the ultimate B-road blaster, without compromising too harshly on long-distance usability

“Our chassis engineers developed bespoke suspension tuned specifically for British B-roads and gave the P1 taller gear ratios, so it was relaxing to use for longer journeys on motorways,” continues Richards.

“Despite having to conform to European type approval and emissions/noise regulations, we still created a car that could reach 60mph in just 4.6 secs – which in 2000 was supercar performance.”

Ford designed the Escort RS Cosworth to take the Group A WRC crown from the Lancia Delta Integrale

The Ford works team’s rationale for producing the Escort RS Cosworth can be summarised in one word: homologation.

A minimum of 2500 cars had to be sold in order to achieve Ford’s aim of taking Group A WRC top honours.

So in 1989 design work started under the auspices of Ford Special Vehicle Engineering’s Rod Mansfield, the year before the cooking Mk5 road car, on which its exterior profile was based, was due to launch.

The Ford Escort RS Cosworth’s underpinnings were taken from the proven Sierra RS Cosworth

The Cosworth’s lines were, however, pretty much the only link with the showroom model.

Under the skin lay a shortened Sierra Cosworth platform, which, according to Geoff Fox, SVE’s manager for special products at the time, had around 50mm trimmed from its wheelbase, making it shorter than a Sierra but longer than a standard Escort.

To save time, little consideration was given to the refinement or driveability of the first 2500 Ford Escort RS Cosworths

The only interchangeable body parts between an Escort Cosworth and a regular Escort were the doors (all RSs were based on the three-door Escort’s design) and the roof.

Such was Ford’s keenness to homologate the car, which was manufactured by Karmann in Germany, that few concessions were made for road driving in the initial production run of 2500.

The early ‘Big Turbo’ engine gives up to 224bhp with a kick

The first cars arrived with customers in late 1992, costing £20,524 and equipped with Garrett T34 turbos, essentially a hybrid unit comprising a different compressor wheel and turbine designed to cater for outputs of up to 350bhp in competition tune.

Known as the ‘Big Turbo’ cars, they had something of a reputation for all-or-nothing performance due to the inherent lag during acceleration.

The RS Cosworth’s Ford Escort Mk5 dash is a mid-’90s button-fest

They were also equipped with a redundant water-injection system, fitted purely to appease the FIA.

Later, post-homologation cars used a smaller Garrett T25 turbo, good for 300bhp outputs, which offered a more linear, road-friendly delivery.

All Escort RS Cosworths were fitted with the Sierra Cosworth’s powertrain, including its viscous-coupled all-wheel-drive system and centre differential, delivering a 34% front, 66% rear torque split.

Sending more torque to the rear than the Subaru Impreza is supposed to make the Ford Escort RS Cosworth feel more predictable on the limit

Len Irwin, who worked at SVE during development, recalls: “We did a lot of testing on frozen lakes in Finland, and I was responsible for tuning the diff.

“We were pleased with the result. Compared with the Impreza, the rear bias gave the Escort more oversteer and greater predictability for a skilled driver.”

The ‘whale-tail’ spoiler on the Ford Escort RS Cosworth adds up to 43lb (19.5kg) of downforce

Then there’s the RS Cosworth’s trademark ‘whale-tail’ rear wing, designed by Frank Stephenson.

Combined with the adjustable front splitter, this distinctive appendage created real downforce for the first time in a mass-produced road car: up to 43lb over the rear axle and more than 10lb at the front.

Frank Stephenson, who later designed the BMW Mini, penned the Ford Escort RS Cosworth

There was talk of a proposed three-way rear wing, but according to Geoff Fox: “It was never even put forward for approval. It remained in Frank’s sketchbook!”

Eight years separate the Impreza P1 (‘P’ for Prodrive) from the earlier Escort, so if you take this period as one where the power-bar would naturally rise, it’s no surprise to learn that the P1’s 1994cc horizontally opposed ‘boxer’ engine makes 276bhp, up 52bhp on that of the Escort.

The Subaru Impreza P1 was effectively a UK-adapted version of the Japan-only WRX STi Type R

While the P1 was not a homologation exercise, it ended up being the only official Impreza on sale in the UK to use the two-door body also employed by the R22B, which was the car used to homologate the Impreza for the WRC.

The P1 was based around the Japan-only WRX STi Type R, with Peter Stevens, of Lotus Esprit and McLaren F1 fame, penning the front and rear spoilers plus the unique alloys.

The Subaru Impreza P1 only came in striking Sonic Blue paint

David Richards is satisfied with the result: “When you look at the whole package, the engine, suspension, interior and Peter Stevens’ unique styling with the Sonic Blue colour, I don’t think there is anything we would have, or could have, changed within the limitations of European type approval.

“The Impreza P1 was probably the best and most successful limited edition we ever created and was a great commercial success for Subaru UK.”

The Subaru Impreza P1’s large steering wheel is an advantage at higher speeds

“Initially we targeted just 500 cars, but demand was so strong that we quickly increased the run to 1000,” Richards continues.

“The cars were being snapped up as quickly as we could make them here in the UK.”

Bob Fuller was among the first in line, having owned his Impreza P1 from new in 2000 after a six-month wait for delivery.

Subaru badges were ditched for this Impreza P1 in favour of a Prodrive logo

Showing build number 548 out of 1000, Fuller’s car has clearly evolved during his tenure with it.

“When Prodrive launched the P1, it offered owners a wide range of official ‘WR’-branded upgrades,” he says. “In an effort to set my car apart, I fitted quite a few of them.”

Fuller chose the optional 18in ‘WR’-branded rims for his Subaru Impreza P1

As a result, his P1 sits on 18in rims, as opposed to the standard 17in items, which also meant larger 330mm front discs could be fitted.

Outside, you clock the two HiD lights on either side of the grille (the only non-approved upgrade), replacing the single-lens units that, says Fuller, were no match for the car’s performance at night.

Other upgrades on this Subaru Impreza P1 include a larger exhaust and deeper bucket seats up front

Completing the package is a Prodrive-approved larger-bore exhaust, which was fitted post-production to get around type-approval restrictions, and upgraded front Recaro seats with deeper bolsters and more upmarket trim.

Inside, it’s clear that the Recaros were a good investment, and you instantly feel comfortable behind the surprisingly large (by today’s standards) red-stitched leather steering wheel.

Hard cabin plastics inside the Subaru Impreza are typical of the era

The dash is typical early-century Subaru: scratchy plastics and faux carbonfibre frame a plethora of dials and switches, including three high-mounted clocks monitoring engine status.

Your view ahead is dominated by the bonnet scoop, mounted just in front of the scuttle.

Turn the key and you just know that the distinctive, deep boxer rumble is a portent for the fireworks that are to follow.

The Subaru Impreza P1’s 1994cc ‘boxer’ makes 276bhp, but it’s delivered in a linear fashion

The P1 is happy to burble around at low speeds, with light steering and a progressive clutch action, but once you start to dip into its well of power the P1 comes alive; now you’re in Richard Burns’ car.

The rumble takes on a hard edge, and while acceleration is surprisingly linear, from 4500rpm to its 8000rpm redline the P1’s full turbocharged majesty can be felt as you grab each higher gear through the notchy, short-throw ’box.

The Subaru Impreza P1 is biased toward understeer, but offers reassuring grip

The large wheel makes the power steering feel lower-geared than it is, but at higher speeds that’s no bad thing, and you delight in its friction-free precision as you dive deeper and faster into bends, failing comprehensively to unstick the wheels from either axle.

The P1’s 45:55 front-to-rear torque split means a degree of default understeer that can be manipulated on the throttle, but overall the P1 has an assured authority over seemingly any road surface.

This Ford Escort RS Cosworth was one of the first to hit British roads

Greg Evans has owned his October ’92 Escort RS Cosworth for six years. It was in storage for nine years before that, which explains why, after nearly 30 years, its odometer reads just 50,600, including the mere 1000 miles added by Evans.

Still in its original Flat Black (a Sierra colour), this completely standard car in factory-fresh condition is one of the first registered in the UK, with build number 851 out of a total run of 7145.

That also marks it as a genuine ‘Big Turbo’ homologation model from the first batch.

Recaro made the seats found in both the Ford Escort RS Cosworth and the Subaru Impreza P1

Drop into the RS’s high-bolstered driving seat and you’re greeted by that familiar smell, which seems to pervade all Ford cabins from this era.

Like in the P1, a trio of dials perches atop an otherwise normal-looking Escort Mk5 dashboard.

You sit behind a smaller three-spoke wheel than in the Subaru, with the pedals offset to the right to clear the broad transmission tunnel and a relatively low-mounted gearlever sited behind the factory radio/cassette player with its separate graphic equaliser.

Below 3500rpm, the Ford Escort RS Cosworth feels like a normal family hatchback

The feeling of normality extends to driving the RS at regular speeds.

It feels softer than the P1, with more rubber in the main controls and suspension making for a more pliant secondary ride versus the Impreza, allied to an engine that at low-to-moderate revs sounds quite anodyne.

You know what’s coming, though: performance is tepid (but less so than expected) until around 3500rpm, when the Garrett T34 starts to spool up, and then comes on full song from 4500rpm.

The difference in power delivery makes these two cars feel of distinctly different vintages

With 224bhp, and weighing 2811lb (1275kg), the RS is no rocketship by today’s standards, but the hefty turbo punch it delivers provides the kind of old-school drama that is sadly missing from modern turbo engines.

Sadly? It’s certainly an acquired taste, and the later RSs, which pulled from 1000rpm lower down, were easier to live with.

But it remains the Big Turbo’s calling card, and that we should applaud.

This duo’s rally pedigree shines through, although neither was built to leave the Tarmac

That both cars were so heavily influenced by motorsport at a technical level rarely seen today is refreshing.

The results were unashamedly road-biased and unlikely ever to see a forest track, but knowing that the teams which created them were at the forefront of world rallying gives each an unmistakable aura.

Images: Olgun Kordal

Thanks to Brands Hatch; Paul Painter; P1 WebOwners’ Club

Success on the world rally stage

Much of the works Escort RS Cosworth’s development work was carried out on the fly by then works driver Malcolm Wilson.

The car made an early, non-competitive appearance with him on the 1992 Scottish Rally; had it been an official entry it might have won, setting faster stage times than Colin McRae’s winning Subaru Legacy.

Ford never achieved its goal of clinching an overall Group A WRC manufacturers’ title, but in its first year, 1993, it won in Portugal, Corsica, Greece, Sanremo and Catalunya.

It then took two more wins in each of the following two years, plus a further two in 1997 in its final ‘WRC’ iteration.

While the P1 didn’t exist to homologate Subaru’s works rally car, the two-door GC8-series Impreza on which it was based was the platform that underpinned the competition machine in which the Prodrive team enjoyed so much success between 1997 and 2001.

Another special edition Subaru Impreza, the RB5, was launched in 1999 to commemorate Richard Burns’ return to Subaru

It won the WRC Constructors’ Championship in 1997 and the Drivers’ Championship in 2001 with the late Richard Burns.

The car evolved significantly during its five-year life and never more so than in 2000, when 80% of its mechanical and electronic components were redesigned, in effect providing the technology for the next-generation Impreza.

Factfiles

Ford Escort RS Cosworth

Sold/number built 1992-’96/7145
Construction steel monocoque
Engine iron-block, alloy-head, dohc 1993cc ‘four’, with Bosch injection and intercooled Garrett T34 turbocharger (Garrett T25 on non-homologation cars)
Max power 224bhp @ 6250rpm
Max torque 224lb ft @ 3500rpm
Transmission five-speed manual, 4WD
Suspension independent, at front by MacPherson struts rear semi-trailing arms, coil springs, telescopic dampers; anti-roll bar f/r
Steering power-assisted rack and pinion
Brakes vented discs, with servo and anti-lock
Length 13ft 9¾in (4211mm)
Width 5ft 8½in (1742mm)
Height 4ft 8in (1425mm)
Wheelbase 8ft 4½in (2551mm)
Weight 2811lb (1275kg)
0-60mph 5.7 secs
Top speed 144mph
Mpg 28
Price new £20,524 (Roadsport trim)
Price now £50-80,000+*

Subaru Impreza P1

Sold/number built 2000-’01/1000
Construction steel monocoque
Engine iron-block, alloy-head, dohc 1994cc flat-four, with fuel injection and intercooled IHI VF28 turbocharger
Max power 276bhp @ 6500rpm
Max torque 260lb ft @ 4020rpm
Transmission five-speed manual, 4WD
Suspension independent, at front by MacPherson struts rear semi-trailing arms, coil springs, telescopic dampers; anti-roll bar f/r
Steering power-assisted rack and pinion
Brakes vented discs, with servo and anti-lock
Length 14ft 3¼in (4350mm)
Width 5ft 6½in (1690mm)
Height 4ft 7in (1400mm)
Wheelbase 8ft 3¼in (2520mm)
Weight 2855lb (1295kg)
0-60mph 4.7 secs
Top speed 150mph
Mpg 24
Price new £31,500
Price now £40-60,000+*