Function – 2003 Volkswagen 1.9-Liter TDI Engine with Pump Injection Design and Function – 2003 Volkswagen 1.9-Liter TDI Engine with Pump Injection The 1.9-liter TDI engine with the new pump injection system meets the stringent demands for improved performance and cleaner emissions. The new 100 bhp (74 kW) 1.9-liter TDI engine