The RENNTech S76R is a reimagined 1992 Mercedes 600 SEL with a massive 7.6 liter V12

Renntech has built a special one-of-a-kind W140 chassis Mercedes-Benz S-Class to show the world what it’s capable of. Under the hood of this already classic 1992 Mercedes 600 SEL is the largest displacement M120 V12 ever built at 7.6 liters, delivering 615 hp (458 kW) to the rear wheels only. Here’s a detailed look at one of the slickest pieces of scrolling we’ve seen this year.

For the uninitiated, Renntech is a performance engineering firm founded in 1989. Since then, it has created some of the most rebuilt modified Mercedes models of all time. At its helm is Hartmut Feil, a man with 12 years of experience at AMG before he was technical director of the North American division. He knows how to make Mercedes even faster than it already was, and the S76R is what Renntech calls “the perfect W140.”

Read more: Making the W221 from the W140 Mercedes-Benz S-Class

Under the hood of the S76R is a heavily modified (yet still naturally aspirated) version of the 600 SEL’s 6.0-liter V12, which was bored out and stretched to 7.6 liters. This is aided by an ME-1 engine management conversion installed along with hand-crafted wiring and a RENNtech ECU tune. The result is a healthy increase from the V12’s 402 hp (408 PS) and 428 lb-ft (580 Nm) to 615 horsepower and 703 lb-ft (952 Nm) at the crank.

Renntech didn’t stop there, as the original model’s 4-speed automatic transmission was replaced with a 5-speed automatic transmission and an OS Giken limited-slip differential. Renntech says that with these modifications, the 4,800 lb (2,177 kg) German sedan can hit 60 mph (96 km/h) in the low 5-second range, with a top speed of around 155 mph (250 km/h).

Renntech has also added some S76R support mods to enhance the experience. These include a custom, hand-crafted stainless steel exhaust system with quad mufflers and sport catalysts that not only increase power, but also give the V12 a louder, coarser growl.

The car was fitted with a bespoke AMG Carbon Ceramic braking system with six-piston calipers on the front axle with four-piston calipers on the rear, while it rides on one-off forged Renntech aluminum wheels measuring 19 x 9 inches. front and 19 x 10.5″ rear with 235/45 (F) and 285/35 (R) Michelin Pilot Sport 4 S tires.

The cabin has a fully customized interior and trim package. Above the passengers is Alcantara cladding with carbon fiber inserts. A leather dashboard sits ahead of everyone, and the seats are trimmed in diamond-cut leather. In fact, the rear seat has been completely replaced with fully adjustable individual rear seats. Renntech has even added a modern sound system with iPhone integration.

Although this example is a one-off, Renntech says it will be happy to build your custom W140 Mercedes S-Class with all these modifications and more, although it did not provide any pricing information.

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Images by Renntech

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