Some interesting info on Interceptor's cut from this page here :
The Saint
Jensen Interceptor Models
Saloon - The Jensen Interceptor Saloon was built from 1966 to 1976, and then again from 1984 to 1991. There were 5655 Saloon models produced. Earlier models carried a single bumper; whereas later models featured a double bumper. Series I models were built from 1966 to 1968. Series II was from 1969 to 1970. Series III was from 1971 to 1976, and was the first model to readily available for sale in the USA. Series IV cars were built from 1984 to 1991.
Ferguson Formula (FF) - The Jensen FF was built from 1966 to 1971 and only 320 were produced in total. The FF can be distinguished from the Saloon by the appearance of dual air vents behind the front wheels -- The Saloon models sport a single air vent on each side. The FF is about 6 inches longer than a Saloon as more space was needed for the additional four-wheel-drive mechanical components. The split bumper is a notable feature on the FF. Some FF models also feature a canvas sunroof, which was a popular addition on British cars of the 1970s. The FF is an upgraded Saloon with all-wheel drive and anti-lock brakes. It was the first production car to have these features, and was declared the world's safest automobile when it was introduced in 1966.
Six Pack (SP) - The Jensen Interceptor SP was built from 1971 to 1973 and only 232 were produced in total. This model was only sold in Great Britain, and could hit a top-speed of 140mph. Externally the only differences between the SP and the Saloon are the badges and hood louvers. An SP has louvers running the full length of the hood. Early Saloons had no hood louvers, with later Saloons sporting louvers running halfway up the length of the hood. The big differences are under the hood, where on the SP you'll find three twin-barrel Holley carburetors in the classic Chrysler "six-pack" configuration. Horsepower was 330 HP in this configuration, and a very few were produced with the high-compression 385 HP option! This is quite a upgrade in performance from the standard 220 HP for Interceptor Saloons of the same era.
Convertible - The Jensen Interceptor Convertible was built from 1974 to 1976, and then again from 1984 to 1991. There were 480 Convertible models produced. The convertible models are easy to spot as they have very distinct convertible tops.
Coupé - The Jensen Interceptor Coupé was built from 1975 to 1976, and then again from 1984 to 1991. Only 55 were produced in total. The "targa bar" across the top is made of smoke-colored glass. The Coupé had more headroom for the rear-seat passengers than any of the other Interceptor models. This is due to the fact that the top went pretty much straight back, rather than sloping down. Jensen Cars Norway has some good pictures of the Coupé.

24 hours in a day, 24 beers in a case. Coincidence? I think not…
70 Challenger
MMA/489
NSS/435