Written from hands-on experience gained from the complete strip-down and rebuild of a Triumph Cars GT6, Haynes can help you understand, care for and repair your Triumph Cars GT6. We do it ourselves to help you do-it-yourself, and whatever your mechanical ability, the practical step-by-step explanations, linked to over 900 photos, will help you get the job done right. Regular servicing and maintenance of your Triumph Cars GT6 can help maintain its resale value, save you money, and make it safer to drive. GT6 Coupe and Vitesse Saloon. Petrol: 1.6 litre (1596cc) and 2.0 litre (1998cc).|GT6 Coupe and Vitesse Saloon. Petrol: 1.6 litre (1596cc) and 2.0 litre (1998cc). Written from hands-on experience gained from the complete strip-down and rebuild of a Triumph Cars GT6, Haynes can help you understand, care for and repair your Triumph Cars GT6. We do it ourselves to help you do-it-yourself.