Two-passenger sports car, retractable-hardtop coupe, luxury roadster, head-up display, radar-operated adaptive cruise control, electronic stability system, magnetic ride control, keyless access with push-button start, heated steering wheel, OnStar communication and navigation systems. Trunk capacity is 11.6 cubic feet with the top up and 4.4 cubic feet with the top down. Premium fuel is recommended. 6-speed automatic transmission. 4.6 liter Northstar V-8 with variable valve timing.