Following further improvements in 2003 T815 gets the new Euro 3 T3C V8 engine mated to all new 14-speed range+split gearbox as well as option for engines from other suppliers most notably Caterpillar, Cummins, Detroit Diesel, Deutz and MTU with its "monster" 22.5 Litre V12 and up to 610 kilowatts power output!