BMW M73

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BMW M73 engine
Overview
Manufacturer BMW
Production 1993–2002
Combustion chamber
Configuration 60° V12
Chronology
Predecessor BMW M70
Successor BMW N73

The BMW M73 is a 60° V12 SOHC piston engine which replaced the M70 and was produced from 1993-2002.

Design[edit]

Compared with its M70 predecessor, the M73 features increased displacement thanks to increased bore (85mm up from 84mm) and stroke (79mm up from 75mm), and an updated roller-rocker valve-train.[1] While most other engines in the BMW range had switched to DOHC and 4 valves per cylinder, the M73 used SOHC and 2 valves per cylinder.[2]

Some versions of the engine have two separate Bosch Motronic ECUs, while others use a single Siemens ECU.[citation needed]

Models[edit]

Engine Displacement Power Torque Redline Year
M73B54 5,379 cc (328 cu in) 240 kW (320 hp) @ 5000 490 N·m (360 lb·ft) @ 3900 6000 1994
M73TUB54 1998

M73B54[edit]

Applications:

  • 1994-1998 E38 750i/750iL/L7
  • 1994-1999 E31 850Ci

M73tuB54[edit]

The M73tu won the "Above 4 L" category of the International Engine of the Year awards for 1999.[3]

Applications:

References[edit]

See also[edit]