Or in the same context for the OP...
Year 0 Year 1 Year 2 Year 3 Year 4
1.4 TSI 160 GT 5dr £19,830 £12,266 £9,904 £8,174 £6,497
Year 0 Year 1 Year 2 Year 3 Year 4
2.0 TDI 140 GT 5dr £20,460 £13,617 £11,370 £9,742 £7,935
So the diesel more than claws its initial additional outlay within 12 months.
Horses for courses.