BMW M70

Name	BMW M70 engine
Manufacturer	BMW
Production	1988–1996
Predecessor	None
Successor	BMW M73
Class	SOHC V12
Engine	5.0 L (4988 cc/304 in³)
Similar	Mercedes-Benz M120 engine |

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

*1988–1994 BMW 750i

1988–1994 BMW 750iL

1991–1993 BMW 850i

1993–1995 BMW 850Ci

1994–1996 BMW 850Csi

The M70 was succeeded by the M73.

__NOTOC__ {| class=wikitable |+Models |- !Engine!!Displacement!!Power!!Torque!!Redline!!Year |- |rowspan=2|M70B50||rowspan=2||| @ 5200|| @ 4100||6000||1988 |- | @ 5200|| @ 4100||6000||1988 |}

Types

Euro Specifications

Displacement:

12 cylinder V-arrangement 60 degree

24 valves

Compression: 8.8:1

Stroke/Bore: /

Firing Order: 1-7-5-11-3-9-6-12-2-8-4-10

Separate twin-ECU engine management (each one for each bank)

Max power: @ 5300 rpm Max torque: @ 4000 rpm

Max rpm: 6000–6400 rpm *Gearing

Applications

1986–1994 E32 7-Series

1989–1999 E31 8-Series

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

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. The S70/2 is similar to the S50B30 engine from the E36 M3 in that the S70/2 features dual VANOS with two position adjustable variable intake valve timing.

Applications

1993–1998 McLaren F1

1998–1999 BMW V12 LM

1999–2000 BMW V12 LMR

S70/3

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

Applications

1995–1996 McLaren F1 GTR (6.1 L)

1997 McLaren F1 GTR (6.0 L)

External links

Johan & Sean's E32 Page - Homepage containing detailed DIY and engine rebuild information for the M70 engine as well as links to official BMW AG engine specs and component descriptions.

M70