When Leyland launched the Tiger, it continued this same unwillingness, just as Dennis was developing the Gardner-engined Dennis Dorchester, which similarly had the potential to win Scottish Bus Group orders away from the Tiger. Faced with this possibility, Leyland offered Gardner 6HLX-series engines in the Tiger from 1984. To facilitate this, the Tiger chassis had to be modified, as the Gardner engine was significantly larger than the TL11. Although the threat from the Dorchester was successfully warded off, there proved to be a limited market for the Gardner-engined Tiger outside of Scottish Bus Group.