BMW N62

The BMW N62 is a naturally aspirated V8 petrol engine which was used in BMW cars from 2001–2010. It also remained in small-scale production for the Morgan Aero until 2019. The N62 is the world's first engine to use a continuously variable-length intake manifold, and BMW's first V8 to feature variable valve lift (called Valvetronic).

Unlike its predecessor and successor, there was no M version of the N62.

In the International Engine of the Year awards in 2002, the N62 was awarded "International Engine of the Year", "Best New Engine" and "Above 4-litre" categories.

Design
The N62 was a clean sheet design and not a direct evolution of the M60 engine line that evolved into the M62 engine. The N62 has a bore of 92 mm and stroke of 82.7 mm for a total displacement of 4,398cc and features double-VANOS variable valve timing on both the intake and exhaust camshafts (the M62 features variable valve timing on only the intake camshaft). As per the M62, the N62 has double overhead camshafts (DOHC) with four valves per cylinder, an aluminium engine block and an aluminium cylinder head. The N62 4.4 featured offset fracture-split forged powdered metal connecting rods and it was also the first V8 and only the second BMW engine to feature Valvetronic technology which on the N62 varies the valve lift of the engine from .03mm to 9.85mm. The redline is 6500 rpm. Valvetronic technology allows for variable valve timing, variable lift and variable duration and the N62 adjusts the lift instead of utilizing the throttle body during normal operation. The engine does feature a throttle body but this is only used for emergency applications in the event of Valvetronic failure, for certain cold start conditions and to maintain a set amount of vacuum in the intake during low load conditions such as cruising on the highway or idling. The vacuum pump mounted on the bank 1 cylinder head only supplies the brake booster and certain auxillaries with vacuum, making the use of the standard TB for manifold vacuum control a requirement for proper functioning of the crankcase ventilation system as well as the fuel evap valve and other emissions related systems.

The N62B44 is the only production engine in the world to feature a continuously variable length intake manifold known as the DIVA intake (not to be confused with the DISA intake as used on many other BMW production engines). The intake length path begins to shorten at 3,500 RPM and is progressively shortened until it reaches it's shortest length at the engine's redline. This maximizes torque throughout the RPM range, producing a much broader torque curve and more peak HP.

Applications:
 * 2004-2005 BMW 5 Series (E60) 545i
 * 2004-2005 BMW 6 Series (E63) 645Ci
 * 2001-2004 BMW 7 Series (E65) 745i/745Li
 * 2004-2006 BMW X5 (E53) X5 4.4i and 4.8is

The N62B48 engine used in the E53 X5 4.8is was a 4.8L variant of the N62B44 which still utilized many features of the N62B44 such as the DIVA intake manifold.

The N62B44 was evolved into the N62B48TU beginning in model year 2005. The N62B48 featured several changes over the N62B44, including an increase in the bore size to 93 mm and stroke to 88.3 mm which increased the displacement to 4798.52 cc. Other changes include different exhaust manifolds, replacement of the DIVA continuously variable length intake manifold to a DISA two-stage manifold, removal of secondary air injection ports and several small changes to accommodate the longer stroke crankshaft such as more traditional non-offset connecting rods and a deeper oil pan. It also featured different spark plugs, oxygen sensors, engine computer and inlet and exhaust valves with a stem diameter decreased to 5mm from 6mm.

Applications:
 * 2005-2010 BMW 5 Series (E60) 550i
 * 2005-2010 BMW 6 Series (E63) 650i
 * 2005-2008 BMW 7 Series (E65) 750i/750Li
 * 2007-2010 BMW X5 (E70) X5 4.8i

N62B36
The N62B36 is a 3600 cc version. Bore is 84 mm and stroke is 81.2 mm. It produces 200 kW at 6,200 rpm and 360 Nm at 4,250 rpm.

Applications:
 * 2001-2005 E65/E66 735i/735Li

N62B40
The N62B40 is a 4000 cc version. Bore is 87 mm and stroke is 84.1 mm. It produces 225 kW at 6,300 rpm and 390 Nm at 3,500 rpm.

Applications:
 * 2005-2010 E60/E61 540i sedan and touring
 * 2005-2008 E65/E66 740i/740Li sedan

N62B44
The N62B44 is a 4398 cc version. Bore is 92 mm and stroke is 82.7 mm. It produces 245 kW at 6,100 rpm and 450 Nm at 3,600 rpm. (except for in the X5 model).

Applications:
 * 2001-2005 E65/E66 745i/745Li
 * 2003-2006 E53 X5 4.4i- 235 kW at 6100 rpm and 440 Nm at 3700 rpm
 * 2003-2005 E60/E61 545i
 * 2003-2005 E63/E64 645Ci
 * 2005-2007 Morgan Aero 8 Series 2 and Series 3

N62B48
The N62B48 has a displacement of 4799 cc, a bore of 93 mm and a stroke of 88.3 mm.

Applications- 261 kW version:
 * 2007–2010 E70 X5 4.8i SAV

Applications- 265 kW version:
 * 2003–2011 Wiesmann GT MF4 / Roadster MF4
 * 2004-2006 E53 X5 4.8iS SAV

Applications- 270 kW version:
 * 2005-2010 E60/E61 550i sedan and touring
 * 2005–2010 E63/E64 650i coupé and convertible
 * 2005-2008 E65/E66 750i/750Li
 * 2008–2010 Morgan Aero 8 Series 4, Series 5, Aeromax, and Aero Coupe
 * 2010–2015 Morgan Aero SuperSports

Alpina H1
The H1 is a version of the N62B44 made by Alpina. The H1 is based on an N62B44 block with a forged crankshaft from Alpina, high strength Mahle pistons and the addition of an ASA centrifugal supercharger. The H1 has a redline of 6,200 rpm.

Applications- 368 kW Applications- 390 kW
 * 2005-2007 in the Alpina B5 (E60/E61)
 * 2006-2007 in the Alpina B6 (E63)
 * 2003-2008 in the Alpina B7 (E65)
 * 2007-2010 in the Alpina B5 S (E60/E61)
 * 2007-2010 in the Alpina B6 S (E63)