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307:. The rear subframe was changed from a sheetmetal to a lighter and easier to manufacture spaceframe design, which also freed up space for the radiator to be fitted next to the engine rather than up front. The company also changed names again, to Howard Heerey Engineering Ltd. By 1972, Heerey had to close up shop and sold the jigs and moulds to HE Glass-Fibre of Hartlewood. They remained dormant until 1976 when KMB Autosports began manufacturing spare parts again, but no new cars were built until the parts and jigs were sold in April 1980 after lengthy negotiations.
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275:. In 1969 the rights to the design and manufacturing were bought by Howard Heerey and the Cox part of the name was dropped. Heerey's father's company, Midland Garage, took over manufacture of the GTM. In April 1980 ownership changed again to GTM Engineering, who upgraded and continued to manufacture the Coupé until 1995.
303:, while his father's Midland Garage took over production. Heerey kept developing the car, reaching a third variant, referred to as 1–3, for "model 1, variation 3", by 1971, when about 170 kits had been manufactured. This third model used the Mini's front bumper (earlier models had none) and the taillights of the
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with the steering arms locked in position with adjustable rods and ball joints. This is held in place by a 1" square tubular space frame, all the way from the rear bulkhead. The front subframe carried the steering rack, fuel tank and radiator. Brakes and wheels remained as per the options available
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The chassis is fabricated from 18 to 20 swg steel, to incorporate the floor pan, boxed sills and the central tunnel box section. It forms a very robust structure. The fabrication is carried forwards in order to locate the front sub-frame, and a 1" square tubular space frame extends beyond the rear
287:. The design is composed of two Mini front subframes, with traditional Mini rubber cone suspension, linked by a sheet steel semi-monocoque chassis. The chassis' deep centre tunnel backbone is supplemented by two generous sills. The car is mid-engined: the rear subframe contained the engine as in a
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The body is moulded in high quality glass reinforced plastic. It is extremely tough, non rusting and, being unstressed, is not subject to gel-coat star crazing as found on many cars using GRP body shells. The windscreen is laminated glass and the rear screen perspex. The doors are double skinned
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As built by GTM Cars, the Coupé was available in several groups of "part packs" that were designed to allow each stage of the build to be purchased separately as they were undertaken, spreading the costs over a period. In 1985 a complete kit cost £2380. "Labour packs" were also available for
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The bonnet is again moulded in high quality glass reinforced plastic. It is hinged at the front to give access to under bonnet space. A completely separate boot compartment situated behind the engine offers 4 cu ft (0.11 m) of luggage space with separate locking boot cover.
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dating back to 1967. GTM is an initialism for "Grand
Touring Mini". The car was first shown at the 1967 Racing Car Show and soon afterwards went into production by the Cox brothers from their garage in Hazel Grove, Stockport as the
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bulkhead to carry the rear sub-frame. Welding was carried out by MIG for consistent quality and to avoid distortion. The chassis was fully jigged during manufacturing to ensure a true and accurate assembly.
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In 2015 Hambly
Sportscars Ltd. purchased the Primo (ex-GTM) Coupé Project, and are now supplying spare parts. They were also developing a Ford Fiesta-engined version of the kit with a new rear subframe.
311:(later GTM Cars) built about 600 more Coupés in a number of iterations from 1980 until 1995, and updated the design in 1983. This was the fifth variation, which received a front-mounted
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glass fibre fitted with anti-burst locks, steel window frames, and steel strengthers to avoid door drop, often found on glass fibre cars. The sliding windows are
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The Coupé is a mid-engined two-seater sports car designed to give outstanding performance for its time, and impeccable handling. The shape was inspired by the
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323:) took over manufacture in 1996 and continued to build the design into the early 2000s, largely unchanged.
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to the Mini, post April 1982 GTM Coupés being designed to allow fitment of 13" wheels. Mini or later
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radiator to minimize earlier models perennial overheating problems. Peter Leslie's Primo
Designs of
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Cox himself only built fifty-five cars. Howard Heerey acquired the rights to the car and renamed it
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441:. Vol. 2 (2nd ed.). Chicago, Illinois: Fitzroy Dearborn Publishers. p. 652.
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customers that wished GTM to undertake specific stages in the construction.
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561:]. Warsaw, Poland: Print Shops Prego - Polska Sp. z o.o. p. 139.
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505:(in Italian). Milano: Editoriale Domus S.p.A. p. 446.
533:"The GTM Story: Part One — The Early Years, 1967 – 1982"
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467:Tranchant, André (October 1985). "Company Lore".
439:The Beaulieu Encyclopedia of the Automobile — G–O
252:1,344 lb (610 kg) (road trim, typical)
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531:Filby, Peter; Stent, Ian (September 1997).
437:Georgano, Nick, ed. (2001). "G.T.M. (GB)".
503:Quattroruote: Tutte le Auto del Mondo 1985
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55:Howard Heerey/Midland Garage (1969-1972)
608:. Hambly Sportscars Ltd. Archived from
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388:A 1985 GTM Coupé (model 1, variation 5)
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584:. Veloce Publishing. pp. 52–53.
501:Mastrostefano, Raffaele, ed. (1985).
226:130 in (3,300 mm) (typical)
7:
242:42 in (1,100 mm) (typical)
234:59 in (1,500 mm) (typical)
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349:, coming from the Mini traveler.
145:Rear mid-engine, rear-wheel drive
398:Honda Powered GTM Coupé at speed
580:Booij, Jeroen (15 March 2009).
482:Sharp, Martin (December 1983).
1:
555:Katalog Samochody Świata 2003
553:Mazur, Eligiusz, ed. (2002).
296:engines could be installed.
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378:A 1969 Cox GTM being raced
218:84 in (2,100 mm)
64:Primo Designs (1996-2001)
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559:World Car Catalogue 2003
488:Cars and Car Conversions
59:GTM Engineering/GTM Cars
52:Cox Brothers (1967-1968)
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35:1978 GTM (variation 4)
484:"Conceptual Struggle"
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469:Kitcars and Specials
413:Official GTMOC Forum
612:on 1 January 2019.
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539:. pp. 36–40.
490:. pp. 66–71.
471:. pp. 44–47.
418:Hambly Sportscars
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582:Maximum Mini
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46:Manufacturer
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84:Primo Coupé
61:(1980-1995)
624:Categories
537:Which Kit?
424:References
357:Re-Release
208:Dimensions
161:Powertrain
120:Sports car
101:~800 built
92:Production
606:"Gallery"
567:1234-8198
260:GTM Coupé
214:Wheelbase
24:GTM Coupé
630:Kit cars
317:Stoulton
177:A-series
41:Overview
366:Gallery
331:Chassis
273:Cox GTM
268:kit car
151:Related
131:2-door
78:Cox GTM
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279:Design
266:based
239:Height
223:Length
193:A-Plus
167:Engine
140:Layout
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294:Metro
262:is a
231:Width
198:Metro
133:coupe
115:Class
586:ISBN
563:ISSN
507:ISBN
443:ISBN
340:Body
289:Mini
264:Mini
258:The
185:Mini
155:Mini
301:GTM
81:GTM
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