Under the 2016 Rolls-Royce Wraith’s massive bonnet is an equally prestigious engine: a twin-turbocharged, 6.6-liter V12. The Wraith’s sedan sibling the Ghost also uses this engine, but in the coupe it makes more power than anything else in the brand’s lineup: 624 horsepower. That power is transmitted to the rear wheels via an 8-speed automatic transmission. Rolls-Royce touts that its transmission uses GPS data to know what the road ahead looks like and supposedly makes shift decisions based on that information. It’s a fine concept but when looking to accelerate we found the transmission sometimes downshifted to an intermediary gear before selecting the one most appropriate for us. Strange behavior for such an advanced transmission, but all told a minor quibble about an otherwise stellar powertrain.