Cheapest engine for 2009 ford Transit Connect Diesel Van

Ford
Model 1-06-12 1800cc Engine Code: P7PA TDCI 4 CYLINDER INLINE 8 VALVE
Engine Code: P7PA Next Step
Ford
Model 2- 06-12 1800cc Engine Code:P9PA TDCI 4 CYLINDER INLINE 8 VALVE
Engine Code: P9PA Next Step
Ford
Model 3- 06-12 1800cc Engine Code:P9PB TDCI 4 CYLINDER INLINE 8 VALVE
Engine Code: P9PB Next Step
Ford
Model 4- 06-12 1800cc Engine Code:R2PA TDCI 4 CYLINDER INLINE 8 VALVE
Engine Code: R2PA Next Step
Ford
Model 5- 06-12 1800cc Engine Code:R3PA TDCI 4 CYLINDER INLINE 8 VALVE
Engine Code: R3PA Next Step
Ford
Model 6- 06-12 1800cc Engine Code:RWPA TDCI 4 CYLINDER INLINE 8 VALVE
Engine Code: RWPA Next Step
Ford
Model 7- 06-12 1800cc Engine Code:RWPC TDCI 4 CYLINDER INLINE 8 VALVE
Engine Code: RWPC Next Step