Compiled by Carl Musson. Sources: Newton’s Illustrated Triumph Buyer’s Guide, Moss Motor’s Triumph TR2-TR4A Spare Parts and Restoration Catalog, and Piggott’s Original Triumph TR Restorer’s Guide.
TS 8637 1 3/4″ Stud Mounted Type H6 Carbs, Grille Flush w/Front Apron
TS8997E: Change Manifold Inlet; Added Cam Bearings
TS 9350 E Change Manifold Inlet, Head Gasket
TS 9731 E Changed to Stiffer Pistons
1956 TS 9666
TS 9952 Change in Filter Head (Oil)
TS 11384 Added Second Silencer to Tailpipe
TS 11716 Change to Headpipe Clamp/Bracket
TS 12567 Changed Windscreen Wiper Motor Type and Location
TS 12606 E Changed to High Port Cylinder Head Assembly
TS 12650 E Change to “Flow through” Filter Head
TS 13046 Changed from Lockhead to Girling Braking System, Changed Master Cylinder,
Front Disc Brakes, Rear Brakes, Rear Axle, Differential, Suspension
TS 13046 Changed to large “T” Pedal Pad
TS 13052 E Change Manifold Inlet, Cylinder Head Studs
TS 14823 Changed Rear Axle Cover
1957 TS 15014
TS 15334 Changed Wheel Cylinder Assembly
TS 15497 Changed to Flexible Fuel Pipe, Petrol Tap
TS 15706 Changed to Combined Tail Pipe/Silencer
TS 18230 E Changed to Chromium-Plated Rocker Cover, Changed Oil Filler/Breather
TS 18902 Change in Oil Drain Plug
1957 (Aug) TS 22013 LAST TR3
TS 22014 Wide Grille, Door Handles, Bumper Overriders, Trunk Lock
1958 TS 25633
TS 26698 E Changed to even Stiffer Pistons
TS 26825 Changed Transmission Input & Main Shaft
TS 26904 Changed to “Handed” Rear Springs
TS 28826 Changed to Dzus Fasteners on Sidescreens
TS 33894 Changed Wheel Cylinder Assembly
TS 41000 (abt) Changed to Type H6 Carbs w/push-on Connectors
1959 TS 41630
TS 41878 Changed Medallion Colors to Blue/White
TS 50001 Change Flywheel Assembly, Shift Knob
TS 56377 Changed to 9″ Rear Drums
TS 60001 Changed Gas Tank, Metal Body, Lucar Connectors,
Squared Rear Seat Shelf, Platforms for Hood & Trunk Hinges
1960 TS 65124
TS 71372 E Changed Clutch Slave Cylinder and Bracket
TS 74331 E Changed Thermostat Housing
TS 78718 E Changed Rocker Shaft Springs
1961 TS 82030
1961 (Oct) TS 83572 LAST TR3A
TSF1 TR4 all synchro gearbox
TSF219 Changed Disc Brake Caliper Mounting
TSF265 Changed Rear Shock Absorbers
TSF284 Minor Change to Front Suspension
TSF530 Last w/TR3 engine
TCF1 First w/TR4 engine
TCF2804 LAST TR3B
by Ken Streeter, with input from Keith Martin and Bill Piggott
One model of TR2/3 can be difficult to tell from another unless you know what to look for. They all resemble bulldogs — short-squat, full of vigor, with distinguishing cut-away doors. The first was the TR2, built from 1952 to 1955. The early “small mouth, long door” has a small, recessed front grille and door skins that extend down to the bottom of the rocker panel.
To spot a really early TR2, check the wiper spindle spacing. The earliest cars had their windscreen wipers only 10.5 inches apart, which caused only a relatively narrow area of the windscreen to be wiped. At TS995, the spacing was increased to 14.5 inches. As the spindle holes are punched into the front scuttle and as it seems unlikely that anyone would ever alter this spacing during a rebuild, the narrow spacing remains a reliable guide to a genuine early TR2. This difference in wiper spacing is surprisingly noticeable on the cars and even in photographs, enabling one to look at a picture of a TR2 with an unknown identity and say with some certainty that it is a sub-TS995 car!
After the first few thousand TR2s, the Triumph factory responded to complains from owners who scraped the door bottoms on curbs by shortening the door skins, and introduced the TR2 model which has come to be known as the “small mouth short door.” Altogether, approximately 8600 TR2s were built.
In late 1955, the TR3 “small mouth” was introduced. This model can be recognized by its grill: the opening is still small, but the grill itself is no longer far recessed, but nearly flush with the front valence. Production reached nearly 17,000 for this model of TR3.
In 1958, Triumph opened up the grill to increase air flow and the TR3A “wide mouth” was born. At 58,236 cars, this is the most common of TR2/TR3 series.
The final version of the TR3 came in 1962. Triumph had released the svelte new TR4, but sales were initially disappointing, particularly in the USA. So the company put the 2.2 liter TR4 engine in left-over TR3 body stock, and created the TR3B, of which 3,331 were built. Without examining the engine compartment, it is difficult to tell a late TR3A apart from a TR3B.
There you go — you now know the quick and easy ways to differentiate between the models of the TR2/TR3 series.