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Innovation came early with the 1967 NSU Ro 80 and its rotary engine

In the late 1960s, when most sedans still looked and drove like rolling conservatism, NSU put a radical four-door on the road ...
Autoblog

Inside the 13B-MSP Renesis, Predecessor of the Latest New Mazda Rotary Engine

How the 13B-MSP Renesis evolved from earlier Mazda rotary designs, technical features explained, and common problems and maintenance issues discussed. The 13B-MSP Renesis rotary engine powered the ...