The BMW S85 is a naturally aspirated V10 petrol engine which replaced the V8 S62 and was produced from 2005-2010. It was BMW's first ever production V10, and the first petrol V10 engine to be available in a production sedan. Used in the E60 M5 sedan, E61 M5 touring and E63/64 M6 coupé, it was inspired by BMW's previous Formula 1 involvement. Peak power is 373 kW (507 PS; 500 bhp) at 7750 rpm and peak torque is 520 N·m (384 lb·ft) at 6100 rpm. The redline is 8250 rpm, and the specific output of over 100 bhp (70 kW) per litre is amongst the highest of naturally aspirated production car engines.