The BMW M73 is a V12 piston engine built in Munich, Germany. It has an aluminum engine block and aluminum DOHC cylinder heads. The cylinders are lined with cast iron. While most other engines in the BMW had switched to four valves per cylinder, the M73 used 2-valve SOHC heads and featured fracture-split forged steel connecting rods.
Models
| Engine |
Displacement |
Power |
Torque |
Redline |
Year |
| M73B54 |
5.3 L (5379 cc/328 in³) |
240 kW (321 hp) @ 5000 |
490 N·m (361 ft·lbf) @ 3900 |
6000 |
1994 |
| M73TUB54 |
240 kW (321 hp) @ 5000 |
490 N·m (361 ft·lbf) @ 3900 |
6000 |
1998 |
A 5.4 L M73 produces 240 kW (326 PS/322 hp).
The M73 won the "Above 4 L" category of the International Engine of the Year awards for 1999. Some versions of the engine have two separate Bosch Motronic electronic fuel injection systems left and right, while others have an integrated system.
The N73B60 is a 6.0 L (5972 cc) version, now switching to four valves per cylinder and the Valvetronic variable valve timing system. Its bore is 89 mm and stroke is 80 mm. It is used in the 760i and 760Li. Output is 445 PS (438 hp SAE/327 kW) at 6000 rpm with 600 N·m (443 ft·lbf) of torque at 3950 rpm.
An enlarged version, with 6.75 L, is used in the 2004 Rolls-Royce Phantom.
Applications:
- 1993-2001 E38 7-Series
- 1994-1999 E31 8-Series
- 1997-2001 E38 7-Series (M73TU)
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