Homologation Paper no: 3071 Dated 1st October 1975   

Permitted modifications. 


1998cc  4 Cyl Chain driven SOHC. 2 or 4 valve per cylinder 


Points and condenser or Luminition Optronic electronic ignition. 

Carburation/Fuel system.

Electric Fuel pump.

Twin HS6 SU’s, 175CD Strombergs or twin Weber DCOE’s 


4 Speed with overdrive. 5 Speed Rover 


The fitting of a concentric clutch slave cylinder assembly is not allowed. 

Back Axle.

4 Links. Salisbury plate type LSD is allowed 


High ratio steering rack. 

Suspension. Front.

McPherson strut with rose jointed bottom arms. 


Coil spring. Telescopic shock absorbers. 


The fitting of a dual master cylinder or any other type of device providing a simultaneous action on all four wheels and divided action on two wheels is permitted providing the original brake pedal and pivot point are used.

The remote brake bias adjuster must be positioned so that it cannot be adjusted by either the driver or co-driver when normally seated in the car. 

A Hydraulic handbrake is allowed. 


Solid 244mm Dia. 9.5mm Thickness Disc. 2 Piston Caliper.

AP Racing Vented 266mm Dia. 20.75mm thick front brake discs and 4 pot callipers.


8” Drum.

AP Racing Solid 266mm Dia. 12.7mm thick brake disc with 2 pot caliper

Wheels and Tyres.

13″ and 15″ wheel rim diameter.

Wheel rim width and Tyre size as per MSA Blue book.

Roll Cage.

There are a number of roll cages available for the TR7.

The roll cage can be either welded/bolted or both. Particular atention must be paid to the positioning of the rear back stays. The bars must be straight and may either pick up the rear shock absorber turret or continue down to the rear chassis sections.


Fibre glass bonnet or boot lid. Composite side windows.                                                                     

Alloy centrally mounted replacement petrol tank.