It will expand into Asia next year, which is likely to take it to a circulation of 800,000.
V-Power is Shell's higher performance fuel, typically used by premium car drivers and motoring enthusiasts.
Crispin Rogers, global loyalty manager for retail at Shell, said: "Redwood is an international publishing agency that produces award-winning customer automotive magazines [for Land Rover and Volvo], so its qualifications were perfect.
"Shell's technical collaboration with premium brands like Ferrari, Audi, Maserati and Ducati will naturally be highlighted [by the magazine]."