The BMW N73 is a

naturally aspirated Naturally may refer to: ;Albums * ''Naturally!'', an album by Nat Adderley * ''Naturally'' (Houston Person album) * ''Naturally'' (J. J. Cale album) * ''Naturally'' (John Pizzarelli album) * ''Naturally'' (Sharon Jones album) * ''Naturally'' ...

V12 V12 or V-12 may refer to: Aircraft * Mil V-12, a Soviet heavy lift helicopter * Pilatus OV-12, a planned American military utility aircraft * Rockwell XFV-12, an American experimental aircraft project * Škoda-Kauba V12, a Czechoslovak experim ...

petrol engine A petrol engine (gasoline engine in American English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as liquefied petroleum gas and ethanol blends (such as ''E ...

which replaced the

BMW M73 The BMW M73 is a naturally-aspirated, SOHC, V12 petrol engine which replaced the BMW M70 and was produced from 1993 to 2002. It was used in the BMW E38 7 Series, E31 8 Series and Rolls-Royce Silver Seraph. Design Compared with its M70 prede ...

and was produced from 2003–2016. It was used in the

BMW 7 Series The BMW 7 Series is a full-size luxury sedan manufactured and marketed by the German automaker BMW since 1977. It is the successor to the BMW E3 "New Six" sedan and is now in its seventh generation. The 7 Series is BMW's flagship car and is on ...

and

Rolls-Royce Phantom Rolls-Royce has used the Phantom name on full-sized luxury cars over the past century: *Rolls-Royce Phantom I, 1925–1931 *Rolls-Royce Phantom II, 1929–1936 *Rolls-Royce Phantom III, 1936–1939 *Rolls-Royce Phantom IV, 1950&ndash ...

. The N73 was the world's first production V12 engine to use gasoline direct injection. Compared with its M73 predecessor, the N73 has dual overhead camshafts, double-VANOS (variable valve timing) and

valvetronic The Valvetronic system is a BMW variable valve lift system which, in combination with VANOS, allows infinite adjustment of the intake valve timing and duration. The system claims to improve fuel economy and emissions, and negates the need for ...

(variable valve lift).

Design

The

variable valve timing In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with varia ...

(VANOS) is a continuously variable design and is present on both the intake and exhaust camshafts. The VANOS units were designed as integral components of the chain drive, and the adjustment ranges are 63 degrees for the intake camshaft and 60 degrees for the exhaust camshaft. The redline for the N73 is 6,500 rpm. The N73 engine also has

variable valve lift Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, ...

(valvetronic), which varied intake valve opening lift from , according to engine speed and load. Each cylinder head has a valvetronic assembly – including a motor, control module and position sensor. The N73 was superseded by the

BMW N74 The BMW N74 is a twin-turbo V12 petrol engine which replaced the N73 and has been produced since 2008. It is BMW's first turbocharged V12 engine and is also used in several Rolls-Royce models. Design Compared with its naturally aspirated BMW N ...

, a twin-turbocharged V12 engine.

Versions

N73B60

The version has a bore of and a

stroke A stroke is a medical condition in which poor blood flow to the brain causes cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. Both cause parts of the brain to stop functionin ...

of . Application: * 2003-2008 E65/E66 760i/760Li * 2017-present

Eadon Green Black Cuillin The Eadon Green Black Cuillin is a British concept car built by Eadon Green and introduced at the 2017 Geneva Motor Show. Design The design of the Black Cuillin is inspired by that of the 1937 Alfa Romeo 8C 2900 and was designed with CAD. Sp ...

N73B68

The version has a bore of and a stroke of . Application: * 2003-2016

References

{{DEFAULTSORT:Bmw N73 N73 V12 engines Gasoline engines by model

Design

Versions

N73B60

N73B68

See also

References