The XD was a family of straight-4 diesel engines designed by Indénor:
- XD75
- XD85 — 1.8 L (1,816 cc)
- XD88 — 1.9 L (1,948 cc)
- XD90 — 2.1 L (2,112 cc)
- XD2 — 2.3 L (2,304 cc)
- XD2S — 2.3 L (2,304 cc), turbocharged
- XD3 — 2.5 L (2,498 cc)
- XD3T/TE — 2.5 L (2,498 cc), turbocharged
Read more about this topic: List Of PSA Engines