How Bentley’s 4.0L Twin Turbo V8 Shuts Down Cylinders


The new Flying Spur V8 builds has a 60-year tradition of using cross-plane V8 engines. The V8-powered Flying Spur has a wonderful engine note, better fuel consumption and fewer CO2 emissions – while still having rocket-like performance.

ore GayCarBoys Stories

The Bentley 4.0-litre V8 engine has a high strength aluminium block, and twin-scroll turbochargers and primary catalytic convertors nesteled in the V of the engine.

Above: This Week’s VIDEO Car Review -2021 Yaris Cross

Help Support Gay Car Boys Subscribe to our Youtube Channel 

ABOVE:

The compact V has a five bearing crankshaft, and a crankshaft which directly drives the water pump and timing chains via an intermediate shaft.

An exactly square engine matches the stroke length to the 86 mm cylinder bore. This gives the engine over 135 bhp per litre, and a top speed of 198 mph (318 km/h).

The V8 puts out 404 kW/ 770 Nm of face-melting power, and a 0-60 mph time of 4.0 secs (0-100 kph, 4.1 secs).

To lower fuel usage even further, the V8 engine can shut down four of its eight cylinders when torque demand is below 250 Nm and engine speed is below 3500 rpm. The driver won’t notice this,  with deactivation times of around 20 milliseconds (a tenth of the time it takes to blink).

The engine uses a two-stage sliding cam system which switches off cylinders two, three, five and eight as necessary via the intake and exhaust valves. The result is a fuel savings of around 30 per cent depending how heavy a foot the driver has. But the temptation will always be to open it up, full bore.

The new Flying Spur V8 is deliver driver-focused, whilst offering passengers the refinement, comfort and technology expected from a grand limousine.

The Flying Spur range is elegant, powerful, and aggressive, while keeping that air of elegant classic Bentley design, best-in-class execution, and authentic materials. The new Flying Spur V8 has contemporary engine technology and the latest driver assistance and infotainment systems for enhanced safety, security and relaxation on every journey.

Written by Alan Zurvas

Alan Zurvas is the founder and editor of Gay Car Boys, Australia's leading LGBTQI+ automotive publication. Before launching GCB in 2008, Alan's automotive writing was published in SameSame.com.au and the Star Observer. With over 16 years of hands-on car reviewing experience, Alan brings an honest, irreverent voice to every review — championing value and innovation over brand loyalty.


Discover more from Gay Car Boys

Subscribe to get the latest posts sent to your email.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Discover more from Gay Car Boys

Subscribe now to keep reading and get access to the full archive.

Continue reading