1975 Triumph TR6 (CR)

The Triumph TR6 (1968-1976) is the definitive TR. Karmann-styled muscular body, 2.5 litre six. 150hp PI (UK) or 104hp carb (US). Around 94,600 built - the best-selling TR. The most popular classic British sports car. Values from £30k.

TR6: Engine: 2.5 straight-six - smooth and torquey. PI: Lucas mechanical injection complex but specialists can make it reliable. Many converted to carbs (accept 20% value reduction). Both: Timing chain, oil leaks, potential overheating. Gearbox: Four-speed with optional overdrive (essential). Differential: Can whine. Chassis: Separate chassis rusts - check outriggers (critical), crossmembers, spring hangers. Body: Karmann-built steel - sills, floors, rear wings, door bottoms rust. IRS trailing arm mounts: Check thoroughly. Values: Strong market. PI premium. Budget £2-4k annually.

TR8 (V8 power), TR7 Sprint (16-valve, 62 built), TR7 Convertible, TR6 PI (injection), 5-speed gearbox (TR8), Overdrive (TR6), Late Canley-built TR7