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Jaguar details the technology behind the I-Pace

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Ahead of it public debut at the Geneva International Motor Show next month, McLaren has released further information on the Senna. Fitted with a 4.0-liter twin-turbocharged V8 – McLaren’s most powerful IC engine ever produced for a road car – the limited release hypercar will develop 800ps and 800Nm.

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As OEMs continue to announce plans to end production of diesel engines, Mercedes-Benz has unveiled its new diesel PHEV C-Class at the Geneva Motor Show. Will this powertrain development give TDI a new lease of life? 


Renault unveils mid-engined Twin’Run concept car at Monaco Grand Prix

Renault unveiled its Twin’Run concept car at the 71st Monaco Grand Prix earlier this month.
Designed in homage to the R5 Turbo and Clio V6 – and a preview of the styling of Renault’s future city car – the Twin’Run is a racing car fitted with the V4Y engine from the Renault-Nissan Alliance, which is used on the road for Laguna, Espace and Latitude, as well as in competition with the Mégane Trophy racer. Mounted longitudinally ahead of the rear axle centerline, the V6 3,498cc powerplant delivers 324ps at 6,800rpm and torque of 380Nm at 4,850rpm. Renault describes the engine as “full-bodied and generous” from low revs, delivering linear acceleration and providing excellent traction around bends and in acceleration.
The V6 is mated to a SADEV six-speed sequential gearbox with limited slip differential, enhancing Twin’Run stability and traction in curves. The twin clutch is also borrowed directly from competition.
The air intake vents are positioned at the level of the rear wheel arches. Air extractors in the rear quarter lights help keep the engine cool. The cooling system has received special treatment with polished aluminum pipes set visibly into the cabin floor. The engine is separated from the driving position by a plexiglass panel.
The concept car is well balanced with a 43/57 weight distribution, to ensure it remains so given the mid-engine architecture, various components were positioned under the bonnet, including include the fuel tank, radiator and the hydraulic system.
The Twin’Run sits on a multi-tube high-performance steel chassis derived from aeronautics and used in competition. The chassis was developed entirely by Tork Engineering. The ground link is provided by front and rear axles fitted with double-wishbone suspension with independent pivots. The four pivots, in solid aeronautical quality aluminum, deliver high performance on the track. For filtering and body stability, Twin’Run is fitted with OHLINS spring shock absorbers at the front and rear.
The axles have an anti-roll bar with a diameter of 22mm at the front and 25mm at the rear. The aluminum wheel covers feature a special hub with a central bolt that can be dismounted in three parts and fit 18” Michelin tyres.
Describing the car, former World Rally champion Jean Ragnotti said, “Excellent traction with a responsive engine delivering full power at all revs, rounder and with more torque than the R5 Turbo, making it particularly effiecent and easy to drive, unlike the R5, which required more technique.” 

29 May 2013


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