Chrysler's slant six engine first appeared in the 1960 Plymouth Valiant and would stick around for nearly three decades. It's time to rank them all.

In the 1960s, two straight-six engines were pitted head-to-head: The Chrysler Slant-6 and AMC Inline-6. Both sold well, but which is the best overall?

Born with a rare but undesirable six-cylinder engine, this 1971 Dodge Challenger now rocks a big-block V8 and R/T badges.