Triumph Serial Numbers Yearly Calendar
This identification guide was originally based on an article written by Paul Towle, past TR8 Registrar for the TR Drivers Club subsequently updated by Rex Holford, the current Registrar. Stewart Rendall provided clarification on a number of points including home market TR8 production history. Most of the information has been cross referenced with at least two separate sources, in an effort to establish some level of authenticity, most notably with various articles by Anders Clausager, current B.M.I.H.T. If you are unsure where to find your Commission Number, or for later cars the Vehicle Identification Number (VIN) then check out where to find the in our locator guide. This data has been transferred from the site, and is the earliest known treatise on production numbers. Assembly Plant: A = Speke-Built Model Range: C = TR7/8 Specification: L = 1975-76 model year North American coupe. G = 1976-78 coupe for home market, Europe and Australia W = 1977-78 model year North American coupe.
H = 1977 TR7 Sprint coupe with four-valve engine. N = TR7-V8 Coupe (for North America?), 1977-78 m.y. T = 1978 TR7 Convertible, for North America. Chassis Number: Varies in the number of digits Option suffixes: U - North American specification cars L - the other left-hand drive cars F - five speed gearbox fitted A - automatic transmission fitted C - exhaust control is fitted. M - Canadian specification.
Production of cars for the home market, Europe and Australia began in May, 1976. 'ACW', 1977-78 model year North American coupe 1977 m.y.: ACW 1 to 17115 (Sep 76 to May 77) 1978 m.y.: ACW 30001 to 33051 (Jun 77 on) and: ACW 40001 to 44328 (Aug 77 to May 78) Maximum production possible by chassis numbers: 24494 4.
'ACL', 1975-76 model year North American coupe. 1975 m.y.: ACL 1 - 7248 (Jan 75 to Sept 75) 1976 m.y.: ACL 10001 - 34099 (Sept 75 to Oct 76) Maximum production possible by chassis numbers: 29798 (31023) 2. ' ACG', 1976-78 coupe for home market, Europe and Australia ACG 1 to 4688 (Jun 75 - Oct 76) approx.
50 cars ACG 10001 to 23406 (Oct 76 - Jun 77) ACG 25001 to 27053 (Jun 77 - Aug 77) ACG 35001 to 37661 (Aug 77 - May 78) Maximum production possible by chassis numbers: 22808 (31023) 3. 'ACW', 1977-78 model year North American coupe 1977 m.y.: ACW 1 to 17115 (Sep 76 to May 77) 1978 m.y.: ACW 30001 to 33051 (Jun 77 on) and: ACW 40001 to 44328 (Aug 77 to May 78) Maximum production possible by chassis numbers: 24494 4. 'ACH', 1977 TR7 16V Sprint coupe with four-valve engine. ACN 1 to 700 (Feb 77 to Oct 77) N.B. Not all numbers used.
60 cars built Feb. 'ACN', Pilot Production TR8 Coupe (for North America?) 1977-78 m.y. ACN 1 to 116 (Feb 77 to Oct 77) N.B.
Not all numbers used. 150 cars built Feb. 'ACT', 1978 Prototype Convertible, for North America.
ACT 1 to 110 (Apr 78 to May 78) N.B. Not all numbers used.
Triumph Serial Numbers Yearly Calendar 2017
10 cars built Apr. Total possible production by chassis numbers: 77320 (or 78545) (Please note that each of these models with different prefixes had their own series of chassis numbers.) Official British Leyland (BL) / Austin Rover production figures for TR7 range at Speke vary between 76081 and 76979. (It is quite possible that not all chassis numbers, even in the ACL/ACG/ACW series, were used) The Speke plant was closed in 1978, all TR7 production having by this time been transferred to Canley. Production was transferred to Canley in October 1978 and continued to August 1980 when car assembly at Canley was stopped. As during this period there was a complete change in identification and numbering system, 78-79 and 79-80 cars will be dealt with separately. 1978-79 cars built at Canley are similar to Speke-built cars and are identified by a three letter prefix in front of the chassis number. The prefixes follow the same system as those on Speke-built cars, except that the first letter is now always 'T' which indicates Canley assembly.
Numbers can be decoded as follows. Assembly Plant: T = Canley-Built Model Range: C = TR7/8 Specification: G = TR7 coupe for home market/Europe/Australia. W = TR7 coupe for North American markets. N = TR8 coupe for North American markets. T = TR7 convertible for North American markets. V = TR8 convertible for the North American markets. Chassis Number: (varies in the number of digits) Option suffixes: U - North American specification cars L - the other left-hand drive cars F - five speed gearbox fitted A - automatic transmission fitted C - exhaust control is fitted.
Another difference is that while different models of Speke-built cars each had their own distinctive series of chassis numbers, it would appear (when comparing with the official production figures) that different models built at Canley shared one chassis number series, or else that there were large gaps in the number series which have yet to be discovered. For this reason, the possible production figures by chassis numbers have not been quoted below. 'TCG', TR7 coupe for home market, Europe and Australia TCG 100001 to 114122 (Oct 78 to Oct 79) 2. 'TCW', TR7 coupe for North American markets TCW 100001 to 115604 (Oct 78 to Oct 79) 3.
'TCN', TR8 coupe for North American markets TCN 150001 to 150198 (78 model year) 160001 to 160142 (79 model year) N.B. It is likely that most of these numbers were not used.
'TCT', TR7 convertible for North American markets. 1979 m.y.: TCT 100001 to 105825 (Jan 79 to Jun 79) 1980 m.y.: TCT 110001 to 115897 (Jun 79 to Oct 79) N.B. It is questionable how many of these cars there were. 79 model year had their own Comm. Number series 80 model year shared with Comm. Number series with TCG and TCW.
'TCV', TR8 convertible for the North American markets. There were some cars built with chassis numbers from TCV 200001 upwards (see section following) for the 1979 model year. It will be seen that all of these Canley-built cars have six figure chassis numbers commencing with the number 1, as the first chassis number issued to a Canley-built car was in fact 100001. In 1979, theoretically from the commencement of the 1980 model year, the previous chassis numbering and prefix system was scrapped and replaced by the VIN (Vehicle Identification Number) system which is now used by car manufacturers world-wide under international conventions. The later Canley-built, and all Solihull-built cars, therefore have VINs rather than chassis numbers, as will be explained in the following section. As a note of interest: TR7s were built at Canley alongside Spitfires and Dolomite Saloons. Make of car T = Triumph 2.
Model range: P = TR7/8 3. Specification: A = UK or Europe K = Australia V = U.S.A., Federal (49 states) Z = U.S.A., California L = Canada J = Japan (not certain if used) 4. Type of body: E = Coupe D = Convertible 5. Type of engine: J = 2 litre four cylinder V = 3.5 litre V8 ( ie. Steering and Gear box: 3 = RHD.
Automatic 4 = LHD, Automatic 7 = RHD, Manual 8 = LHD, Manual 7. Major model change: A = 1980 Model.B = 1981 Model Year.C = 1982 Model Year 8. Assembly plant: T = Canley A = Solihull. Note:- Not used on UK Models. The chassis number series for Canley-built cars with VINs, from October 1979 to August 1980 is as follows: 200001 to 215080 (all models mixed in the same series) Please note however that as mentioned above there were a few cars with numbers from 200001 upwards which still had pre-VIN style prefixes, notably TR8 convertibles type TCV. Apparently a batch of 1981 model year cars were built from May 80 to June 80 as follows, 402001 to 402026.
This fits in with the 1981 Solihull production sequence. The official BL/Austin Rover figures for Canley production suggests a total production here from 1978 to 1980 of 30054 to 30375 cars. Solihull cars largely follow the VIN system as set out above, but with a different chassis number series and on later cars, an additional three prefix letters.
THE TRIUMPH TR7: BORN OF TROUBLED TIMES By 1973, was in serious trouble. Parent company had managed to 'snatch failure from the jaws of success,' taking Triumph from incredible success in the late 1960s to the brink of insolvency by 1971. Through bad management, questionable backroom dealings (Jack Sangster sold off all the company assets at bargain-basement prices) and the onslaught of the (mainly ), Triumph suddenly found itself woefully outclassed by its rivals. Throughout the 1960s, the hot Triumph 650 twins, the, and the twin-carb legend were widely-regarding as the fastest motorcycles a 'normal person' could buy (ie: not expensive like a Vincent Black Shadow), the superbikes of their day.
Then the Honda 750 Four arrived, and suddenly the old vertical twins were losing their relevance. BSA not-so-quickly responded in 1971 with a whole new range of 650 twins, for which they designed virtually everything new except that one major component that needed changing: the engine.
Instead, they created an entirely new all-welded steel double front downtube frame which carried the engine oil in its large-diameter backbone/seat post. There were new forks, new wheels & brakes, new bodywork, switchgear, the works. However, the 3 major things the bike really needed to be competitive with the Japanese were painfully absent: Electric start, 5-speeds & a front disk brake. TRIUMPH TR7 MUCH-IMPROVED The launched amid major design & development problems - the engine wouldn't fit in the new frame! The entire top end needed to be redesigned to make it work.
That wasn't all; the seat height was over 34 inches, too tall for most riders. It took until the 1973 model year for Triumph to sort out what was now called the Triumph TR6 Tiger. TRIUMPH TR7 750 WITH 5-SPEEDS In 1973, the Triumph twins & finally got 5-speed transmissions & a front disk brake. 5-speeds had been optional since 1971, but were now standard across the line.
While the 649cc TR6 Tiger remained, a new punched-out version was introduced called the TR7 750 Tiger. In fact, these early machines were bored from 71mm out to 75mm for a displacement of 724cc. However, later in the 1973 model year, a new cylinder casting made it possible to increase the bore again to 76mm for a displacement of 744cc. The 82mm stroke remained unchanged on all models.
TR7 BY THE NUMBERS Starting in 1971, all single-carb 650 & 750 twins were called 'Tigers'. Other than a brief one-year appearance in 1960, when the name TR7 was used to describe left-over that were being sold alongside. Otherwise, the TR7 name didn't appear again until the 1973 model year as the big-bore single-carb Tiger, as the TR7P (Police) & the TR7RV (Roadster w/5-speed). Early-1973 724cc Triumph TR7RVs had engine & frame numbers running from KH17122 to XH21715. Later 1973 TR7P Police bikes with 744cc ran from GH35388 to GH35466.
And the 744cc TR7RVs ran AH23727 to GH35387. From Model-Year 1974 until its demise in 1983, the only single-carb big twins were the Triumph TR7 Tiger, gone forever was the (with one exception: in 1983, the final year of Triumph production, one last 650 was briefly built under the name Triumph TR65, meant to be an entry-level version.). ABOVE: What's missing here?
Oh yeah, the shifter! This 1976 Triumph TR6 was the first year for left-foot shift. Heresy of heresies!! TRIUMPH TR7 - RIDING OFF INTO HISTORY While the twin-carb always stole the spotlight, the single-carb 750 Triumph TR7 and its predecessor was judged by many to be the better bike. While producing marginally less horsepower at max rpm, in real-world practical terms, the Tiger was just as fast at the Bonnie. And the single carburetor delivered much better drivability at low speeds. Two cylinders breathing through one throat makes for higher vacuum & more even pulses, both very good for carburetors.
So they pull harder at low engine speeds & in the higher gears when vacuum usually drops. This becomes even more pronounced when you raise your final gearing (lower numerical ratio, ie: smaller rear sprocket). And of course one carb is always easier to tune than two.
I've had both, and while people love looking at those twin carbs, the TR7s usually ran better. Triumph TR7 YEAR-BY-YEAR.