Nissan S15 SIlvia The Nissan S15 Silvia is a heavily engineered, high-performance example that combines the lightweight, rear-wheel-drive character of the iconic S-chassis with the substantial power and tuning potential of a fully forged RB25DET engine, producing an astonishing 600bhp. Replacing the original four-cylinder powerplant with Nissan’s legendary 2.5-litre turbocharged straight-six, the fully forged engine has been built to withstand the increased cylinder pressures and demands associated with serious performance driving, while a methanol setup allows the engine to operate at higher boost and ignition levels when correctly calibrated. The resulting power output transforms the already lightweight S15 into a seriously rapid machine, with the RB25DET delivering the distinctive straight-six character, strong torque and aggressive turbocharged acceleration for which these engines are renowned. Supporting such substantial power requires a comprehensively upgraded drivetrain, coolin