The Ford Sierra Cosworth RS500 is one of the coolest creations to come from Ford of Europe. It's an upgraded version of the already great Sierra Cosworth, designed for race homologation and built in limited numbers. The very first RS500, chassis No. 1, is about to be auctioned off. You should totally buy it.
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The RS500 was the most hardcore road-legal Sierra ever built, assembled by engineering firm Tickford in the UK. The biggest upgrade from the normal car was Cosworth's monstrously capable competition engine, with thicker cylinder walls, a larger turbochargers, a bigger intercooler, an upgraded oil cooling system, and a stronger fuel pump. The result was an impressive 224 horsepower, with the capability to exceed 400 horsepower in race trim.
Other upgrades to the RS500 include bigger wings front and rear, as well as brake cooling ducts in the place of fog lights. Only 500 examples were built, all sold in the UK in right-hand drive configuration.
The listing makes it clear this is not a pre-production car, but rather the very first production RS500 off the line. Furthermore, it was the only Cosworth to be built entirely by Ford rather than contracted out to Tickford, making it all the more desirable for the discerning collector. While most RS500s were painted in black, this one wears an uncommon white scheme. Modifications from stock include a replacement dashboard to replace the aging original unit and a Magnex exhaust system.
With an estimate of £90,000-120,000 (around $122,000-$162,000 at current exchange rates), it's certainly not cheap for a Sierra. But considering the legendary status of the RS500 and this particular car's significance, it's not totally unreasonable.