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Hennessey tunes the McLaren MP4-12C

Texas tuner Hennessey Performance will offer an upgrade package for the McLaren MP4-12C. The result is an 800-hp machine that looks even more sinister than the car it came from. The blood-red paint, carbon-fiber aero kit and blacked-out wheels in the rendering all say supercar to us.

Concept Car of the Week: Oldsmobile Golden Rocket (1956)

From 1949 to 1961, General Motors ran its own motor show. Called Motorama, the annual event was a showcase for concept cars which revealed prospective design and technology directions for all of GM's brands and for cars in general. Each year, one-off creations were designed and built for GM's multiple divisions, from Chevrolet all the way up to Cadillac.

Geneva motor show (2013) A-Z news and reviews

Welcome to CAR's guide to the 2013 Geneva motor show. We're bringing you news of every launch as it happens (including full details on the new 950bhp Ferrari LaFerrari and 903bhp McLaren P1) and we've gathered together all our stories on the most important new cars in this handy A-Z guide. Alfa Romeo 4CAlfa's gorgeous £50k Porsche Cayman rival Alpina BMW B3 BiTurboBMW tuner builds a turbocharged straight-six M3 Aston Martin Rapide S Aston facelifts its elegant limo, gives it extra 80bhp Aston Martin Vanquish CentenarySpecial 565bhp Vanquish celebrates Aston's 100th birthday Audi S3 SportbackAudi takes on the hot hatch crowd with 296bhp Quattro Audi RS Q3 It's the first ever SUV from Audi's RS tuning arm Bentley Continental Flying SpurBentley's fastest ever four-door packs 616bhp  Bertone RapideEver thought your Aston Rapide needed more boot space? Try this...