The Penalty for 50,000 Feet of Freedom? About 200 Pounds
Jared Gall at Car and Driver has compiled a fantastic list of coupe vs. convertible weights and found that, on average, roughly 200 pounds is needed to give God a direct look into your car. But there’s hardly any consensus among different automakers.
Porsche, for example, has no difference in weight between its Cayman and Boxster, whereas BMW’s 4-series carries a 500-pound penalty for plein-air cruising. Many bespoke two-seaters carried small penalties for drop-top enthusiasts: Jaguar’s F-Type, Alfa Romeo’s 4C and Chevrolet Corvette convertibles were all only 1 to 2 percent heavier.
The story also measures the sound difference between coupe and soft-top versions with the roof up, which was virtually imperceptible for all cars. The Corvette and Bentley Continental GT V-8 S had the largest measurable noise differences, a whopping 3 decibels above the coupe versions at 70 mph.
Basically, to get a car full of hot air you either need 200 pounds of retractable roof or a coupe with a TTAC editor riding shotgun.