1973 | Triumph TR 6 PI

1973 Triumph TR6 – Fully restored road-going sports car in racing specification

$80,046
DE flag
Dealer

Description

Chassis number: CF 10369UO | Engine number: CF 10635UE

This exceptional 1973 Triumph TR6 is a very special vehicle. It was designed for demanding drivers and technically developed to such an extent that its performance and handling are significantly beyond the level of a standard TR6. This vehicle is not for the faint-hearted – its character and capabilities can only truly be experienced behind the wheel.

Between 2015 and 2021, the vehicle underwent a comprehensive full restoration, including complete separation of the body from the chassis and extensive technical reworking. Almost all major components were overhauled, improved or replaced. The result is a road-legal TR6 in a highly developed racing specification, combining the classic character of a Triumph with modern engine management and significantly reinforced suspension, braking, drivetrain and cooling systems.

The extensive vehicle history includes invoices totalling demonstrably more than €70,000, documenting the considerable technical and financial effort invested in this vehicle. In 2022, the TR6 was assessed by an independent expert as part of an insurance valuation and awarded a condition rating of 1.

**Engine and performance - **The original 2.5-litre engine was comprehensively developed and increased to a displacement of approximately 2.7 litres. The engine rebuild and development were carried out by SZS Motortechnik für Klassische Fahrzeuge Entwicklungs- und Vertriebsgesellschaft mbH in Harxheim, Germany. The company's managing director, Stephan Schamschula, is himself active as a Triumph driver in historic motorsport.

The output of the upgraded engine is stated at approximately 190–225 hp, depending on the stage of development and engine calibration. The development focused on both high performance and the highest possible mechanical durability.

Key engine components and equipment features:

  • Engine enlarged to approx. 2.7 litres
  • High-performance cylinder head with Mahle valves
  • ARP cylinder-head studs
  • PI pushrods and refurbished rocker arms
  • Kent sports camshaft
  • Lightweight Fidanza flywheel
  • Phoenix big-bore exhaust system
  • Oil cooler with thermostat
  • High-performance Denso/WOSP starter motor
  • Bosch alternator with 55 A
  • High-performance aluminium radiator
  • Kevlar and silicone coolant hoses
  • Electric SPAL fan with two-stage thermostatic control by Revotec

Recommended operating fluids:

  • Fuel: Aral Ultimate 102
  • Engine oil: Castrol Edge 10W-60

The vehicle was tested using GPS measurement and achieved acceleration from 0 to 100 km/h in approx. 5.4 seconds. This gives the TR6 exceptionally dynamic performance for a classic sports car.

**Electronic fuel injection and engine management - **A key feature of this TR6 is the modern electronic fuel injection (EFI), which overcomes the limitations of the original carburettor system. At the heart of the system is a standalone ECUMaster EMU-Black engine control unit, enabling precise control of fuel injection, ignition and other engine functions.

The ECUMaster system comprises:

  • Modified CP/CR throttle bodies with ball-bearing actuation
  • Bosch EV6/EV14 fuel injectors
  • Bosch throttle-position sensors
  • Bosch fuel-pressure regulation
  • Bosch air-temperature and coolant-temperature sensors
  • Bosch barometric-pressure sensor
  • Bosch lambda sensor
  • Innovate MX lambda controller
  • IFM Hall-effect sensor for measuring engine speed
  • Fuel-pressure sensor with a measuring range of 0–5 bar
  • Magneti Marelli idle-control valve
  • OBP swirl tank for fuel supply
  • Bosch high-performance fuel pump
  • Pierburg lift pump
  • Braided stainless-steel fuel lines as well as Teflon and aluminium lines with Dash-6 fittings
  • Beru ignition coils and associated high-performance ignition leads

**Transmission and drivetrain - **As part of the conversion, the original gearbox was replaced with an LT77 five-speed gearbox. This modification improves everyday usability and enables more relaxed driving at higher speeds without compromising the characteristic driving style of the TR6.

The drivetrain specification comprises:

  • LT77 five-speed gearbox
  • Sachs high-performance clutch pressure plate
  • LUK clutch disc
  • Reinforced clutch hydraulics
  • Reinforced drive shafts
  • Quaife rear-axle differential and wheel hubs
  • Final-drive ratio 3.7:1
  • Reinforced rear-axle assembly

The Quaife differential improves traction during sporty cornering by distributing drive torque more strongly to the wheel with the better available grip at any given moment. This is particularly advantageous when accelerating out of corners and represents a significant technical upgrade for a vehicle in this performance class.

**Suspension and chassis - **The original chassis and frame were hot-dip galvanised, achieving excellent corrosion protection. The body and the individual vehicle components were refurbished and recoated as part of the complete restoration.

The suspension specification comprises:

  • Reinforced front axle
  • Reinforced axle components by Uncle Jack's
  • Polyurethane suspension bushes
  • Reinforced front springs with approx. 370 lb/in
  • Reinforced rear springs with approx. 370 lb/in
  • Spax telescopic dampers front and rear
  • Adjustable rear damper mounts by RacingGreen
  • 1-inch anti-roll bar
  • Quaife rear-axle hubs
  • Reinforced drive shafts

**Braking system - **The braking system was comprehensively reworked and adapted to the increased engine output and heightened dynamic requirements.

Front axle:

  • Refurbished original brake callipers
  • Reinforced master cylinder and brake booster design
  • EBC brake discs
  • Internally ventilated ATE brake discs
  • High-performance brake pads according to the documented development stages: Hawk HPS, Mintex 1144 and Ferodo DS2500
  • Sport-oriented and motorsport-focused brake optimisation

Rear axle:

  • Alfin brake drums
  • Oversized wheel cylinders
  • Moss TT brake shoes

**Wheels and tyres - **The vehicle is fitted with 16-inch König aluminium wheels measuring 7 × 16 inches, installed in August 2019.

Current tyre specification:

Bridgestone Turanza T005 – 205/60 R16

The track spacers are approximately:

  • Front axle: +3 mm
  • Rear axle: +8 mm
  • Wheel bolt pattern: 4 × 114.3 mm

**Cooling and fuel system - **The cooling system was comprehensively improved to meet the higher engine output and demanding operating conditions.

The equipment comprises:

  • High-performance aluminium radiator
  • High-performance radiator core
  • Kevlar and silicone coolant hoses
  • Electric SPAL suction fan
  • Two-stage thermostatic switching by Revotec
  • Aluminium fuel tank with a capacity of 50 litres
  • Motorsport-oriented fuel system with swirl tank and high-performance fuel pumps
  • Modern high-pressure components for electronic fuel injection
  • Improved, sheathed fuel lines throughout

**Bodywork and restoration - **The restoration was carried out as a complete body-off project. The aim was to create a technically sophisticated and long-term usable TR6 – not merely a visually refurbished original vehicle.

The scope of the restoration included:

  • Complete restoration with the body separated from the chassis
  • Hot-dip galvanising of the chassis and frame
  • Electroplating of individual components
  • Complete engine rebuild
  • Overhaul and upgrade of the gearbox
  • Complete reworking of the suspension
  • Overhaul and improvement of the braking system
  • Professional refurbishment and painting of the body
  • 12 layers of paint
  • Vinyl soft top in an authentic original-style finish
  • Vinyl soft-top cover in an authentic original-style finish

The vehicle remains finished in its classic Royal Blue (paint code 56) with a black interior (trim code 11).

**Interior and instrumentation - **The interior preserves the classic character of the original TR6 while incorporating subtle improvements suited to the increased performance.

Equipment features:

  • Mazda MX-5 seats upholstered in the style of the original TR6 interior
  • Stack instrumentation
  • Oil-pressure gauge
  • Coolant-temperature gauge
  • Fuel gauge
  • Oil-temperature gauge
  • Battery and charging instrumentation
  • Halogen headlights
  • Headlight relay kit

**Technical documentation and vehicle history - **The extensive documentation contains numerous records relating to specialist components, modifications and installation dates, including technical developments from 2018 to 2021. The documents record work on the engine, gearbox, electronic fuel injection, suspension, braking system, fuel supply and vehicle electrics.

The technical equipment includes numerous components from renowned manufacturers and specialists, including Quaife, Spax, Phoenix, ECUMaster, Bosch, EBC, Hawk, Mintex, Kent, Fidanza, WOSP, RacingGreen and König.

The vehicle history contains demonstrably well over €70,000 in invoices. This underlines that substantial investment was made in the vehicle's technical development and substance, rather than merely in superficial cosmetic refurbishment.

**Summary - **With its 2.7-litre high-performance engine, approx. 190–225 hp, standalone ECUMaster injection and engine management, LT77 five-speed gearbox, Quaife differential, reinforced chassis, upgraded Spax suspension, improved braking system, Phoenix exhaust system, 16-inch König wheels and comprehensively optimised cooling and fuel systems, this TR6 offers a driving experience fundamentally different from that of a standard vehicle.

This Triumph was built for someone who genuinely wants to drive and experience it, rather than merely display it. A serious sports car for ambitious drivers: developed with motorsport in mind, road-legal and equipped with the technical specification, documentation and level of investment befitting its exceptional performance.

Viewings are strictly by prior appointment only.

 

This description has been automatically translated. Original language: German.

Condition & Registration

Condition category
Restored
MOT
MOT until
06/2027
Historical license plate
Registered
Ready to drive

Self assessments

Engine (Seller assessment)
★★★★★
Paintwork (Seller assessment)
★★★★★
Interior (Seller assessment)
★★★★★
Technique (Seller assessment)
★★★★★

Inspection Report

Grade 1.75
Report available
Condition grade
1.75
Report provider
Classic Data
Condition grade1.75

Documents & Invoices (2)

Technical Details

Vehicle data

Make
Triumph
Model series
TR 6
Model name
TR 6 PI
First registration date
07/1973
Year of manufacture
1973
Mileage (read)
37,777 mi
Chassis number
CF 10369 UO
Engine number
CF 10635UE
Gearbox number
Mazda 5 speed
Number of owners
4

Technical details

Body style
Convertible (Roadster)
Power (kW/hp)
147/200 (Factory: 92/125)
Cubic capacity (cm³)
2700
Cylinders
6
Doors
1
Steering
Left (LHD)
Gearbox
Manual
Gears
5
Transmission
Rear
Front brakes
Disc
Rear brakes
Disc
Fuel type
Petrol

Individual Configuration

Exterior color
Blue
Manufacturer color name
Royal Blue
Interior color
Black
Interior material
Leather

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