BMW M73
BMW M73 engine | |
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Overview | |
Manufacturer | BMW |
Production | 1993–2002 |
Layout | |
Configuration | 60° V12 |
Displacement | 5379 cc |
Cylinder bore | 85 mm (3.35 in) |
Piston stroke | 79 mm (3.11 in) |
Valvetrain | SOHC |
Timing drive system | Chain |
Combustion | |
Fuel type | Petrol |
Chronology | |
Predecessor | BMW M70 |
Successor | BMW N73 |
The BMW M73 is a SOHC V12 petrol engine which replaced the BMW M70 and was produced from 1993-2002. It was used in the BMW E38 7 Series, E31 8 Series and Rolls-Royce Silver Seraph.
Design[]
Compared with its M70 predecessor, the M73 features an updated roller-rocker valve-train and an increased displacement, due to a bore increase of 1 mm (0.04 in) and a stroke increase of 4 mm (0.16 in).[1] While most other engines in the BMW range had switched to dual overhead camshafts with four valves per cylinder, the M73 used a single overhead camshaft and with two valves per cylinder.[2]
Some versions of the engine have two separate Bosch Motronic engine control units,[3] while others use a single Siemens ECU.[4]
Models[]
Version | Displacement | Power | Torque | Year |
---|---|---|---|---|
M73B54 | 5,379 cc (328.2 cu in) | 240 kW (322 hp) at 5,000 rpm |
490 N⋅m (361 lb⋅ft) at 3,900 rpm |
1994 |
M73TUB54 | 1998 |
M73B54[]
Applications:
M73TUB54[]
Due to more stringent emissions standards, the 1999 model year marked the addition of an electronically heated catalyst,[5] variable MAP thermostat, and water cooled alternator.
Applications:
- 1998-2001 E38 750i/750iL/L7
- 1999-2002 Rolls-Royce Silver Seraph
- 2013 Monte Carlo Automobile Rascasse
Awards[]
- 1999 International Engine of the Year - Best Above 4.0 Litre category winner[2]
References[]
- ^ "Information on M73 engines". www.bmwheaven.com. Retrieved 5 August 2017.
- ^ a b "BMW Super Bild Of The Day: 5.4 liter BMW V12". www.bmwblog.com. Retrieved 5 August 2017.[permanent dead link]
- ^ M73 Training Reference Manual (PDF). p. 2. Retrieved 10 April 2017.
- ^ "E38 750iL Engine electrical system engine". www.realoem.com. Retrieved 10 April 2017.
- ^ "BMW M70, M72 and M73 V12 Engines". www.unixnerd.demon.co.uk. Archived from the original on 7 January 2016. Retrieved 5 August 2017.
See also[]
- BMW engines
- V12 engines
- Gasoline engines by model