Проект новой М3 F32

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А это что такое

The engine design virtually copies the BMW M70 V12 layout but with 4 more cylinders added.
In July 1987 the development started and by the beginning of the 1988 the engine was ready. It was put on dynamometer in January 1988 and was tested through out February of 1988. Later it was installed in a modified long-based BMW 7-series (E32) and was mated with the 6-speed manual gearbox taken from BMW 8-series (E31).

6651 cc V16 engine
Cast silicone aluminum block and cylinder heads.
SOHC, 2 valves per cylinder.
Bore and stroke: 84 mm x 75 mm. Bore spacing: 91 mm.
Compression ratio: 8.8:1
Maximum power: 408 hp (304 kW) @ 5200rpm
Maximum torque: 637 N·m (470 lb·ft) torque @ 3900rpm
Redline: 6000rpm
Engine Management: 2 separate Bosch DME 3.3 for each bank
Dry weight: 310 kg

The engine never reached production and remained to show the possibilities of BMW engineers.