During this time, American legacy automaker General Motors debuted its monstrous 11.5-liter V12 engine for heavy-duty trucks, and it remains a giant even by modern standards. How big? It's the ...

the company launched the Vector M12. But this time, things had changed. The M12 used a 5.7-liter V12 engine sourced from Lamborghini. It produced 492 horsepower and was paired with a five-speed ...