It's been gone for nearly 20 years, but now the Toyota Supra is back - designed in cooperation with BMW. The two-seater sports car has the same underpinnings as the new BMW Z4. The Supra is powered by a 250-kilowatt three-liter six-cylinder engine that is also used in the top version of the Z4, the M40i. We see what the two have in common - and what sets them apart.