| Built | 1970 - 1973 |
| Numbers | 385 |
| Chassis | 7'6" wheelbase chassis - as S2
Double wishbone coil spring suspension. Last 96 cars built on M series chassis |
| Engine | Triumph 2.5 litre straight 6 |
| Comment | An S3 or S4 Vixen with a TR6 engine. Some insist these were called Vixen 2500s but officialy they were simply 2500s Two thirds of the cars where exported to North America. |