Charactéristics:
3331 TR3B were build from march 1962 till september 1962 (only for the USA)
1)Serial number TSF1 to TSF530 (identical to the TR3A)
- Engine: 4 Cyl, 1991 cm3, 100 hp DIN at 5000 rev/mn (83 mm x 92 mm)
- Compression 9:1, Torque 16,2 Mkg at 3000 rev/mn, 2 carburators SU H6
- Gearbox 4 speeds (Overdrive in option)
- Front disk brakes
- Dimensions (L x l x h) : 3,84 m x 1,41 m x 1,28 m, Weight : 955 kg
- Performances: 165 km/h (with OD) .

2) Serial number TCF1 to TCF2804
-Engine and gearbox of the TR4,
- 4 Cyl, 2138 cm3, 105 hp DIN at 4700 revr/mn ( 86 mm x 92 mm)
- Compression 9:1, Torque 18 Mkg at 3000 rev/mn,
-2 carburators SU H6
- Gearbox 4 speed synchronised (Overdrive in option)
- Front disk brakes
- Dimensions (L x l x h) : 3,84 m x 1,41 m x 1,28 m, Weight : 955 kg
- Performances : 170 km/h

From the chassis n° TS60000, the manaufacturing body tools have benn modified. Some TR3A and all TR3B have been build with these tools some particularities are externally visible such as the bonnet and boot hinges are raised.