The "12" in NH12 refers to its D12 engine family, which was a "world engine" designed for high power and low emissions. VOLVO D12C 420 Euro 3 engine - Diva-portal.org
Features up to 4 engines and 8 gearbox options. Volvo NH12 2000 1.46
High levels of tuning with three distinct interior designs and custom FMOD sounds. The "12" in NH12 refers to its D12