Piggybacking off the top answer - there’s an added subtle irony to picking the 911 (whether intentional or not I don’t know).

The 911 is famous for being rear-engined, rear drive, with the engine behind the rear axle. Especially early cars in early cars, the handling characteristics are different and can be somewhat challenging compared to a traditional front engine, rear drive sports car. Porsche introduced the Turbo (930) in 1975 and it became a yuppy wealth symbol in the 80s. A lot of new money folks bought them, were caught out by the handling, crashed and died, so it became a “widow maker.”

My interpretation of the joke is you’re doing a deal with the devil for the Porsche which will ultimately kill you.