BMW automotive engine families listed as M73. Specifications below retain the source's separate family and variant labels.
Family specifications
BMW M73 engine
| Field | Reported value |
|---|---|
| Manufacturer | BMW |
| Production | 1993–2002 |
| Configuration | 60° V12 |
| Displacement | 5.4 L (5,379 cc) |
| Cylinder bore | 85 mm (3.35 in) |
| Piston stroke | 79 mm (3.11 in) |
| Valvetrain | SOHC |
| Valvetrain drive system | Chain |
| Fuel type | Petrol 95 RON Hydrogen |
| Predecessor | BMW M70 |
| Successor | BMW N73 |
Variant specifications
Models
| Version | Displacement | Power | Torque | Year |
|---|---|---|---|---|
| M73B54 | 5,379 cc (328.2 cu in) | 240kw (326hp) at 5,000 rpm | 490 N⋅m (361 lb⋅ft) at 3,900 rpm | 1994 |
| M73TUB54 | 5,379 cc (328.2 cu in) | 240kw (326hp) at 5,000 rpm | 490 N⋅m (361 lb⋅ft) at 3,900 rpm | 1998 |
| M73 (Hydrogen) | 5,379 cc (328.2 cu in) | 300 N⋅m (221 lb⋅ft) at 3000 rpm | 490 N⋅m (361 lb⋅ft) at 3,900 rpm | 2001 |
Recorded vehicle applications
M73B54
- 1994–1998 E38 750i/750iL/L7
- 1994–1999 E31 850Ci
M73TUB54
- 1998–2001 E38 750i/750iL/L7/hL
- 1998 Cardi Curara
- 1999–2002 Rolls-Royce Silver Seraph
- 2009–2010 Simbol Design Lavazza GTX
- 2013 Monte Carlo Automobile Rascasse
BMW automotive engine directory
Design, development and variant notes
The M73 enlarged the M70 to 5.4 litres and introduced roller-rocker valve actuation while retaining a single camshaft per bank and two valves per cylinder.
The article describes two Bosch engine-control units coordinated with a Siemens EML throttle controller. The later technical update added emissions and cooling changes, including electrically heated catalysts.
Data adapted from the cited Wikipedia revision by Wikipedia contributors under CC BY-SA 4.0. Production dates and fitments reflect that revision; verify the exact engine code, market and vehicle before applying a specification.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- Wikipedia: List of BMW engines. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1382309748; accessed 2026-11-10.
- Wikipedia: BMW M73. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1348056838; accessed 2026-11-10.
Further Wikipedia-sourced details
The following additional information is drawn from the cited Wikipedia revision by Wikipedia contributors, available under CC BY-SA 4.0. An open-ended date reflects the source snapshot, not confirmed current production or fitment.
Additional technical and variant notes
The M72B54 was a four-valve-per-cylinder V12 feasibility prototype, distinct from the production two-valve M73. The article lists 265 kW and 530 N⋅m for that prototype.