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| Triumph I6 | |
|---|---|
 | |
| Overview | |
| Manufacturer | |
| Also called | Triumph Six Cylinder |
| Production | 1960–1977 |
| Layout | |
| Configuration | Naturally aspirated Straight-6 |
| Cylinder block material | Cast iron |
| Chronology | |
| Successor | Leyland PE166 engine |
The Triumph Six Cylinder or Triumph I6 engine is a cast-iron overhead valve straight-six engine produced by Standard Triumph. It is an evolution of the Standard Motor Company's inline-4 Standard Eight, with the addition of two cylinders and a larger displacement.
Introduced in their Standard Vanguard Six in 1960, it was used in a wide range of Triumph vehicles, including the Triumph TR5, TR250, and TR6.