Not wanting to take any chances with the quality and durability of its offering, Horch developed its machining operations with metallurgy giant Krupp in Essen to greatly improve the hardness of the materials and thus boost wear resistance.
The resulting engine, with its overhead camshaft and, later, 10-bearing crankshaft, was offered in capacities of up to 5 litres by way of lengthening the stroke.
So equipped, Hugo’s Horch 780 Sport-Cabriolet boasts a useful 100bhp and, while torque was not quoted at the time, the 104mm stroke and 87mm bore would have guaranteed a strong hauling ability.
In truth, the non-synchronised first gear is hardly needed, even when pulling away from a standstill, unless you’re starting on an incline.
Small lamps illuminate the Horch 780 Sport-Cabriolet’s numberplate
It’s laid out in an H-pattern, with first and second where you’d expect them but third and fourth switched around, with direct third in the lower-right slot and the overdrive top ratio above it.
All but first are, according to period Horch proclamations, ‘silent gears’.
There is more than enough pace in this car, Hugo confirms, that on the open road he can easily maintain a 70-80mph cruising speed.
In its brochures, Dutch importer Auto-Palace compared the Horch with the famous Flying Scotsman London-to-Edinburgh express train – not only in terms of speed, but also comfort.
The Horch 780 Sport-Cabriolet will cruise happily at 70-80mph
With a 3.45m-long wheelbase, the Sport-Cabriolet’s seating is generous and the thick black fabric roof looks as if it would weather any storm.
There was also a four-door version of the 780 or, if that wasn’t opulent enough, Horch could offer you its vast Pullman range.
The interior is lavish, with leather, wood, plush carpet and ivory, and finely detailed instruments.
The speedometer reads to just over 150kph (94mph), and is joined by gauges for water temperature, oil pressure, fuel level and the passing of time.
It took 25 years to restore this Horch 780 Sport-Cabriolet
The clock still ticks as the hands move around the face, not something you always see in cars of this age.
“I made sure that the clock works perfectly,” smiles Hugo.
“At a concours d’élégance, you will be marked down if it doesn’t. As a regular judge myself, I have to set a good example!”
There is no rev counter; it wasn’t considered necessary by Horch – after all, the straight-eight is not a highly strung sprinter but a calm powerhouse.
The Horch 780 Sport-Cabriolet’s dials sit in a central binnacle
Notable details inside include the porcelain ashtray near the driver’s left knee and the electric lighter on the far right of the dashboard.
You don’t have to remove it to light your Cohiba Esplendidos: it’s enough to gently press the cigar against it and push a button.
The windscreen can be opened at the bottom for ventilation, while the rear-view mirror is attached to an adjustable arm with a neat extension allowing the driver to see over the hump of the convertible top when folded.
There is no power steering and, although the brakes are vacuum-assisted, this luxury car of more than two tonnes demands strong arms and powerful thigh muscles to drive.
‘The Horch’s rear-view mirror is attached to an adjustable arm with a neat extension allowing the driver to see over the hump of the convertible top when folded’
The Horch was a jewel in the crown of its nation’s automobile industry, comparable in many ways to the great Mercedes-Benz models of the period.
The German writer and Nobel laureate Paul Thomas Mann was an advocate.
“I drive a Horch 8, because it is both elegant and efficient at the same time,” he wrote, underlining the blend of beauty and speed in his favoured cars from Zwickau.
The lofty comparisons continue, because the 780 Sport-Cabriolet was styled by Hermann Ahrends, who would later be responsible for the legendary Mercedes-Benz 540K Spezial Roadster.
The Horch’s removable rear trunk houses a trio of fitted leather suitcases
The Horch’s bodywork was made in part by Dietzsch in Glauchau, Saxony, and the straight-eight was designed by Fritz Fiedler under the supervision of Paul Daimler, eldest son of Gottlieb Daimler.
In short, the 780 Sport-Cabriolet is a vehicle with a first-class CV.
Horch is said to have built 250 examples of the 780, of which 16 cars are known to remain.
If it weren’t for the attentive Canadian border police and Hugo’s contribution to the survival of chassis 78157, perhaps that list of survivors would be one fewer.
Images: Luuk van Kaathoven
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