Buick: Powertrain innovation is a Buick hallmark. Today, the company’s turbocharged, direct-injected 2.0L delivers 259 hp, but displacement was king in the 1960s and ‘70s. Buick’s largest engine, a 455-cubic-inch (7.5L) V-8, was introduced in 1970.

Complex: The Regal, as powered by that 2.0L, certainly does have a decent amount of power and we do approve, but it's got nothing on the cool factor of a 7.5L V8.