BMW M70

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The BMW M70 is a V12 piston engine and featured heavily in the 7-Series and 8-Series BMW's of the late 80's and early 1990s. Models included:

  • 1988–1994 BMW 750b
  • 1988–1994 BMW 750iL
  • 1991–1993 BMW 850i
  • 1993–1995 BMW 850Ci
  • 1994–1996 BMW 850Csi

The M70 was succeeded by the M73.


Models
Engine Displacement Power Torque Redline Year
M70B50 5 L (4988 cc, 304 cu in) 220 kW (295 hp) @ 5200 450 N·m (332 lb·ft) @ 4100 6000 1988
220 kW (295 hp) @ 5200 450 N·m (332 lb·ft) @ 4100 6000 1988

Types

M70 engine in 1992 750iL

Euro Specifications

  • Displacement: 5 L (4988 cc, 304 cu in)
  • 12 cylinder V-arrangement 60 degree
  • 24 valves
  • Compression: 8.8:1
  • Stroke/Bore: 75 mm (3 in)/84 mm (3.3 in)
  • Firing Order: 1-7-5-11-3-9-6-12-2-8-4-10
  • Max power: 220 kW (295 hp) @ 5300 rpm
  • Max torque: 450 N·m (332 lb·ft) @ 4000 rpm
  • Max rpm: 6000–6400 rpm *Gearing

Applications

S70B56

5.6 L version

Applications

  • 1992–1996 E31 8-Series
  • Developed specifically for the 1992 BMW 850CSi, a BMW Motorsport vehicle
  • Lowest production engine in BMW history—1,510 units
  • Engine was used in a few supercars of the late 1990s

S70/1

6000 cc (approx.) version.

Applications

  • M8 prototype

S70/2

6.1 L (6064 cc, 370 cu in) version developed for the McLaren F1. The S70/2 was a complete redesign from M70 with no common parts, featuring a lighter and smaller engine block. It is actually closer to an S50B30 engine from the E36 M3. It features BMW VANOS two position adjustable variable intake valve timing.

Applications

S70/3

6064 cc version, further refinement of the McLaren F1 engine meant for racing. Later destroked to 5990 cc in 1997.

Applications