How Much is a 1978 Triumph Bonneville Worth at Auction?

The Triumph Bonneville, production year 1959, is an iconic vintage British motorcycle that appeals to classic car and motorcycle enthusiasts for its timeless roadster styling and lively parallel-twin engine. Its distinctive twin exhaust note, chromed tank details, and adaptable chassis helped spawn the cafe-racer movement and cement its place in mid-century motoring history. Well-regarded by vintage collectors, the Bonneville combines authentic period character with enduring collectible appeal.