Powered by a 615 hp, 7.6 -liter M120 V12 engine, the S76R is the most powerful naturally aspirated V12 built by RENNtech and the largest displacement on record for the Mercedes Benz M120.
In 1992 RENNtech turned out the first performance versions of the Mercedes-Benz M120 V12 -engine. Bored and stroked to a displacement of 7.4-liters and with up to 585 hp of power, these super engines found their way to the RENNtech SL 74 (R129), CL 74 (C140), and the S 74 (W140) through the 1990's.
Fast forward 30 years and RENNtech is following the same blueprints from an era of naturally aspirated and over-engineered luxury by turning a 1992 600 SEL into a 2022 RENNtech S76R through a complete restoration, re-power and interior re-fit.
Power: RENNtech bored and stroked the 6.0-liter V12 to an astounding 7.6 -liters, resulting in the largest M120 V12 -engine to date. With the addition of lightweight pistons, titanium connecting rods, beehive springs and titanium retainers for improved spring rate and lighter mass, AMG performance cams, ported heads, custom built airboxes, larger injectors, and fitted with a MY 96 ME-1 engine management system complete with rebuilt wiring harness and RENNtech ECU Performance Tune, the S76R engine is also the most powerful N/A M120 -engine built by RENNtech.
Rated at 615 hp and 703 lb-ft of torque, the M120 -engine produces 213 hp and 275 lb-ft of torque over the stock 6.0-liter (402 hp / , 80 hp more than the ultra rare AMG 7.3-liter found in the SL 73 AMG, S 73 AMG, and CL 73 AMG, and just shy of the 631 hp Mercedes-Benz CLK GTR super car.
Through an extremely labor intense process, the 1992 600 SEL was upgraded to model year 1996 engine management (ME-1) system to fit an RENNtech upgraded 722.6 electronic 5-speed transmission connected to an OS Giken Limited Slip differential. The combination greatly improves power delivery and drivability beyond what the original 4-speed transmission and differential could offer and handle.