In the automotive world, the Porsche 911 has gone 51 years with a 6 cylinder boxer engine mounted behind the rear wheels. Purists would argue that it's not air cooled anymore, but the fact that it lasted 50 years with such a screwball arrangement is nothing short of incredible.
Also, the Ford Mustang has been a sporty two door coupe with a V8 since 1964. Clearly Ford got it exactly right if that platform still has a hold on the market even as it's "pony car" competitors disappeared from the market. They're back now, but none of them can boast the 50 years of longevity the Mustang has.