The 2010 BMW 550i Gran Turismo will start at a price of $64,725. The 550i will be the only BMW 5-Series GT on sale during the 2010 year. The power train will be a 4.4-litre V8 engine with 400-horsepower and 450lb-ft of torque. Power will go to the road through an 8-speed automatic transmission which will help fuel economy, as well as performance. The 0-100km/h...