2013 Bentley Continental GT V8 Owners Manual – The story goes that former Bentley manager Franz Joseph Paefgen casually asked a professional simply how much a lot less gas he reckoned the new twin-turbo V-8 he was working on would shed. The informal response — “perhaps as much as 40 pct much less” — obtained created into the boss’ 2008 Geneva dialog, together with a promise to preserve existing performance ranges. Hence was born a technology mandate that most likely gained that expert a great pantsing from his cubicle mates. Even so, in Jan, Bentley’s new commander in chief, Wolfgang Durheimer, hoisted the “objective attained” banner ad in Detroit. Months later on, we visited north Spain’s Navarra race circuit to check Bentley’s math — at least on the “equivalent performance” assurance.
Before we obtain for that, let’s zoom in on that goal-attained declaration. The 40 pct advancement state generally seems to entail liberal rounding of the Western city gasoline-usage numbers: The 2008 Conti drank 25.3 liters/100 km; the V-8 just 15.4 for a 39.1 percentage enhancement (the Euro put together score betters by 36.7 pct). Invert those intake stats to calculate the more Yank-familiar miles per gallon, and Euro city “economy” advances by 97.8 percent, from 9.3 to 18.4 mpg. Closing EPA tests are not total, but preliminary city/highway results are a lot less scintillating — 15/24 mpg for the V-8 coupe, up from 2008’s 10/17. That works over to a 50/41 % rise in the economy, or a 33/29 percentage reduction in usage. Still impressive.
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Bentley characteristics 65 pct of the development to the downsized, recalibrated, very low-friction 4.0-liter dual-turbo V-8, co-produced with Audi (for the S8), showcasing cylinder deactivation. A new 8-10-speed ZF auto transaxle is recognized with 15 % of the increase, and the relaxation would go to decrease going amount of resistance car tires, smart charging, on-desire strength directing assist, and small improvements in volume and drag.
These status-of-the-craft V-8 paths exhaust to the valley whereby its twin-scroll turbos stay, so burned petrol scarcely slows down well before hitting a turbine impeller. In the same way, the consumption oxygen, improved by 17 psi (W-12s make use 9), exits the valley using an atmosphere-to-h2o intercooler and nips around the entrance of the cylinder heads to get into the engine from the outboard. Even with all of that improve stress, the pistons squish the air by a component of 9.3:1, counting on the air conditioning impact of straight injections to avoid detonation.