and Japan. The Corvair is twenty inches longer, seven inches wider, eight hundred pounds heavier and includes an engine almost twice the size of the Beetle that inspired it. Corvair offered VW's rear engine advantages of traction, light steering, and flat floor with Chevrolet's six-passenger room and six-cylinder power American buyers were accustomed to. Later versions of the Corvair were considered sports cars rather than 'economy' cars including Monza Spyder models, which featured one of the first production car turbocharged engines. The Corvair Monza was followed by the Falcon-based Ford Mustang, introduced in 1964, establishing the "pony car" class which included Corvair's replacement, the Chevrolet Camaro in 1967, expanding the domestic pony car market segment started in mid-1960s. The 1960s also saw the swan song of the rear-engined rear-wheel-drive car RR layout. The first models designed with this layout in Central Europe before the second world war, had better traction than any other two wheel drive car layout. They were very capable in the mountainous country there, that had many unsurfaced roads, just how capable was shown by the performance of the two wheel drive military Kübelwagen version of the VW Beetle. This layout also had better interior space utilisation than front engine rear-wheel-drive cars, and a better ride than those with a live rear beam axle. It was an affordable way to produce a car with all round independent suspension, without the need for expensive constant-velocity joints needed by front-wheel-drive cars, or axle arrangements of FR layout cars. They could have road-holding issues due to unfavorable weight distribution and wheel camber changes (rear wheel tuck under), of the lower-cost swing axle rear suspension design. These were highlighted and a little exaggerated by Ralph Nader. These problems were ameliorated on later Beetles and were eliminated on the second-generation Chevrolet Corvair with the switch to a four-link, fully independent rear suspension. The Hillman Imp, NSU Prinz 4 (styled by Claus Luthe) and Soviet Zaporozhets all had styling cues derived from the original Corvair. Connections to the Corvair are mentioned on their respective Wikipages. The only economy cars with this layout launched since the 1960s have been the turn of the millennium ultra compact two seater city car Smart Fortwo and Indian market Tata Nano. RR layout cars launched in the 1960s include: The 874 cc Hillman Imp - UK. The 583 cc NSU Prinz, and the relatively unsuccessful attempt at diversification