A whole succession of printing presses, machine tools, motorboats, aircraft, railway engines, trucks and automobiles have been powered by an engine from the factories of D Napier and son. From racing cars to weighing machines for the Bank of England, from world-class Deltic locomotives to the Napier Lion racing aircraft engine, the most powerful of the world's machines have been Napier powered. This volume tells the history of D Napier and Son from the company's beginnings in Lambeth to the works in Acton, NW London. Other works were later located in Luton and Liverpool too. At its peak 20,000 people worked for the Napier company, which now produces from the Napier Turbocharger Works at Lincoln.