It is based on the platform of the fifth generation Volkswagen Golf, and were from start available with a 1.6 litre MPI petrol engine with 75 kW/102 hp, 1.6 and 2.0 litre FSI petrol engines with 85 kW/115 hp and 110 kW/150 hp respectively, and 1.9 and 2.0 litre TDI diesel engines with 74 kW/100 hp and 100 kW/136 hp respectively.
The diesel engines received an update in 2004. The 1.9 litre TDI engine are now available in 66 kW/90 hp and 77 kW/105 hp versions, and the 2.0 litre TDI engine has now 103 kW/140 hp.
The Touran received an facelift in late 2006. Both the 1.6 and 2.0 litre FSI petrol engines were replaced by a 1.4 litre TSI petrol engine in 103 kW/140 hp and 125 kW/170 hp versions. The 2.0 litre TDI engine were now also available in a 125 kW/170 hp version.