1992–1996





The ultimate E31 — the M-division's 850CSi with a bespoke S70 engine, stiffer suspension, and wider tires. The closest BMW came to a V12 supercar.
History
The S70 engine wasn't just a bored-out M70 — it was fundamentally redesigned by BMW Motorsport with different bore spacing, individual throttle bodies, and 380 hp. Only 1,510 were built. The 850CSi was the spiritual predecessor to the McLaren F1's S70/2 engine.
Production & Heritage
Production Total1,510
DesignerKlaus Kapitza
Production Period1992–1996
Estimated Value$80K–$150K
Value estimates are editorial assessments based on recent auction results and market trends.
Technical Specifications
Engine5.6L V12 (S70B56)
Power380 hp
Transmission6-speed manual
DrivetrainRWD
Weight1,810 kg
Engine Details
Displacement5.6L (5,576 cc)
Performance
Weight-to-Power4.8 kg/hp















