Southall's Greatest Triumph: How the AEC AV590 Powered a Nation

Britain’s Fallen Engines

Britain’s Fallen Engines

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In 1979, the historic Southall factory in West London closed its doors, marking the end of the Associated Equipment Company (AEC) under the management of British Leyland. But the 9.6-litre AV590 diesel engine they forged refused to die. Designed specifically to survive the brutal stop-start abuse of London Transport, the AEC AV590 became the mechanical heartbeat of the capital inside the legendary red Routemaster bus. In this documentary, we explore the rise and fall of this bespoke British engine. Discover how a heavily de-rated, indestructible iron straight-six mastered the streets, how the massive Aldenham Works kept it running indefinitely through a brilliant overhaul system, and why corporate consolidation, government regulations, and the shift towards rear-engined buses ultimately killed the factory but couldn't silence the sound. This is the story of the AEC AV590—the mechanical trust that Britain lost.

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