The Alpina came only as an automatic, using a five-speed BMW Steptronic transmission allied to a downgraded 4.6 L Alpina-tuned V8 motor from the Alpina E39 B10 V8 S (M62). In order to complete the car's transition from sportscar to boulevardier, relaxed suspension tuning was used. The standard Z8's run-flat tires and 18 inch wheels were discarded in favor of conventional tires with softer sidewalls, and 20 inch wheels. A new, softer grade of Nappa leather replaced the Z8's less supple specification, and special Alpina gauges were featured on the dash cluster. An Alpina steering wheel with three solid spokes replaced the original, which could not be retrofitted with shift paddles for the automatic. Gear selection was displayed in an Alpina-specific display mounted in front of the wheel.