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Mercedes-Benz unveils its revamped G-Class

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The all-new G-Class makes its public debut at the Detroit auto show in G550 form. Completely redeveloped and fitted with a 4.0-liter V8 biturbo gasoline engine offering 427ps and 450 lb-ft of torque at 2,000rpm to 4,750rpm, despite near-identical looks to its predecessor plenty has changed for the Mercedes-Benz SUV.


Ford’s F150 pickup gets its first diesel motor

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Developed by the powertrain team behind the 6.7-liter Power Stroke engine for super duty trucks, the all-new 3.0-liter V6 Power Stroke unit promises 250ps, 440 lb-ft of torque, and an anticipated 5175kg of towing capacity.


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In light of Fisker's solid-state battery breakthrough and claims of a one minute charge time, will this electric vehicle technology development kick-start mass BEV uptake? 

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Jaguar reveals frugal diesel engine

Jaguar has unveiled its most efficient engine yet in the form of a new 2.2-liter diesel unit. 

Developing 187bhp and 450Nm of torque, the four-cylinder engine, which is based on the same diesel powertrain family that’s been co-developed by Ford and PSA Peugeot Citroen, and employed in the likes of the Citroen C5, Peugeot 4007 and Ford Mondeo, is capable of returning 52.3mpg on the combined cycle while emitting 149 g/km of CO2.

Fitted to a prototype Jaguar development vehicle, the 16-valve common rail diesel displaces 2,179cc and is installed in a north-south configuration. The engine features a water-cooled turbocharger with low-friction pistons, new injectors and a new crankshaft. The new configuration allowed Jaguar engineers to add a new oil pan and new electronic systems that affect the crankshaft, which means that the new stop/start system operates more efficiently, says the British carmaker.

Jaguar’s stop/start system features a new crankshaft sensor and a fuel rail pressure holding system, which allows the engine to need less time to restore drive through an innovative engine restart capability. Most conventional systems work in such a way that the engine needs to shutdown completely before restarting again, but the Jaguar system is able to restart the engine while it's shifting down from as little as 400rpm, meaning it does not need to come to a stop. Jaguar estimates that the use of the stop/start device increases overall fuel efficiency by up to 7%.

Along with a new engine, the development vehicle debuts an advanced eight-speed ZF automatic gearbox. With the seventh and eight ratios effectively acting as overdrive gears, the new gearbox allows the 2.2-liter engine to be optimized to deliver swift responses when required. The sprint to 62 mph takes 8.5 seconds before achieving a maximum speed of 140 mph.

 

30 March 2011


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