The "Detroit Devil" is a famous Australian X-treme drag racing semi-truck owned and raced by Bruce McDonald in the late 1970's. It was a Kenworth K125 heavy-duty cab-over semi-truck.

Powered by a turbocharged Detroit 12V-71T two-stroke diesel engine producing around 1,100 horsepower, paired with an Allison HT760 automatic transmission on torsion bars.

The Detroit Devil competed in The ‘Truck King of Australia’ was a much saught after title. The tough competition was determined by eight wins from eight standing starts.It gained legendary status in Australian truck racing when it famously beat American racer Tyrone Malone and his famous "Super Boss" Kenworth drag truck with a quarter-mile time of 14.03 seconds (later dropping to 13.94 seconds) at Melbourne's Calder Raceway in 1978. The Detroit Devil was given a 1.5 second handicap but some other trucks were given up to nine seconds.