Volvo and Mack Truck seem like such different companies. Mack is famous for their big trucks and their shiny chrome bulldog mascot. Volvo makes trucks and heavy equipment, but is more well known by American consumers for their well-crafted cars.
But the two companies are related. Engines for both companies are built on the same production line.
Road King explores how two engines may come from the same production line, run off the same ultra low sulfur diesel (ULSD) fuel, yet still have imporant differences that make the two engine unqiue. You can’t judge an engine merely by its cylinder heads.