The BMW S68 is a
twin-turbo
Twin-turbo is a type of turbo layout in which two turbochargers are used to compress the intake fuel/air mixture (or intake air, in the case of a direct-injection engine). The most common layout features two identical or mirrored turbochargers in ...
charged
V8 engine
A V8 engine is an eight- cylinder piston engine in which two banks of four cylinders share a common crankshaft and are arranged in a V configuration.
Origins
The first known V8 was the Antoinette, designed by Léon Levavasseur, a ...
produced by
BMW
Bayerische Motoren Werke AG, trading as BMW Group (commonly abbreviated to BMW (), sometimes anglicised as Bavarian Motor Works), is a German multinational manufacturer of vehicles and motorcycles headquartered in Munich, Bavaria, Germany. Th ...
. Its first use was in the 2022 revised
BMW X7
The BMW X7 is a full-size luxury crossover sport utility vehicle manufactured by BMW. It is BMW's largest and second most expensive SUV in its line-up.
The X7 was first announced by BMW in March 2014. It was officially unveiled on October 17, 2 ...
as the M60i.
A few weeks after its presentation, BMW showed a study of the
XM with a more powerful version of the engine.
In addition, the basic version is also used in
BMW 760i,
BMW X5 M60i, and
BMW X6 M60i.
Design
The S68 has the same piston stroke of and displacement as its N63 predecessor, but the compression ratio of 10.5:1 corresponds to the higher compressed predecessor variants.
It has one turbocharger per cylinder bank and both turbochargers are placed in the middle of the cylinder banks in a hot-vee design taken from the previous S63 variant; there is only one exhaust manifold. The S68 is the only current production V8 engine offered with a cross-pattern exhaust manifold for improved turbo charger pressure by combining exhaust pulses which comes at an expense of sound alternation, making the sound closer to a 180 degree configuration V8. The engine oil is cooled by an external cooler, and a newly developed oil pump is used for the oil circuit. The engine is now only offered as a 48-volt mild hybrid powerplant
mild hybrid
Mild hybrids (MHEV) (also known as smart hybrids, power-assist hybrids, battery-assisted hybrid vehicles or BAHVs) are generally cars with an internal combustion engine (ICE) equipped with a minimally extended battery and an auxiliary electric co ...
system, it has a electric motor with a torque of ; unlike the previous mild hybrid systems from BMW, this is installed within the transmission.
The electric motor is also used for hot starts, while cold starts are performed by a standard 12 volt starter similar to most other engines. The batttery required for this has a 90 Ah capacity. The 48-volt battery found in the X7 M60i, XM, and the 760i models has a capacity of 20 Ah.
The variable camshaft control (
VANOS
VANOS is a variable valve timing system used by BMW on various automotive petrol engines since 1992. The name is an abbreviation of the German words for ''variable camshaft timing'' ().
The initial version (retrospectively renamed "single VANOS ...
) is now electrical and no longer hydraulic.
The S68 currently meets the
Euro 6d emissions standard,
but should also be able to achieve the stricter Euro 7 standard, which is planned for 2025.
The electric motor in the S68 has a torque of .
Maximum revs are 7200 rpm.
Applications
* 2022–
G70 760i xDrive
* 2022–
G09 XM
* 2023–
G05 X5 M60i
* 2023–
G06 X6 M60i
* 2024–
F95 X5 M Competition
* 2024–
F96 X6 M Competition
* 2023–
G07 X7 M60i
* 2023–
G07 Alpina XB7
* 2024–
G90 M5
* 2024–
G99 M5
* 2024–
Range Rover (L460)
* 2024–
Land Rover Range Rover Sport (L461)
* 2024–
Land Rover Range Rover Sport SV
* 2024–
Land Rover Defender OCTA
See also
*
List of BMW engines
BMW has been producing engines for automobiles, motorcycles and aircraft since 1917, when the company began production of an inline-six aircraft engine. They have been producing automobile engines since 1933.
Motorcycle engines
Automotive ...
References
{{BMW automotive petrol engines: 2000s to 2010s
S68 S68 may refer to:
* S-68, a Greenlandic sport club
* S68 (Long Island bus)
* S68 (Rhine-Ruhr S-Bahn), a commuter rail line
* BMW S68, an automobile engine
* County Route S68 (Bergen County, New Jersey)
* Gunaikurnai language
* Sikorsky S-68, an Amer ...
Land Rover engines
V8 engines
Gasoline engines by model