What is the oldest powertrain currently on sale in a car or truck in the US market?

I want engine and transmission combination here (if it’s a single-speed, then I want reduction boxes between the engine and the axle). Can you beat the Yaris?

Because that’s my entry - the 2018 Toyota Yaris, using the same 1NZ-FE engine and U340E automatic transmission combination that the 2000 Toyota Echo had.


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