In most countries the price of diesel is about 25 percent less than that of gasoline. Thus, you should multiply most of the prices in the table below by 1.33 to get the price of gasoline. In Switzerland and Slovenia, diesel is more expensive than gasoline. Diesel engines run about 25 percent more efficiently than gasoline engines. Therefore in most countries you end up saving about 40 percent on your fuel costs if you drive a diesel rather than a gasoline-powered vehicle.
Diesels perform better in the mountains.
Though not naturally as powerful as gasoline engines, diesels are often boosted by turbo chargers to make up the difference. Diesel is in fact available wherever gasoline is sold. Table Driving.1 Recent Average Diesel Prices. Fuel is much more expensive at stations along the expressways. Supermarkets along main roads at the edges of towns sell the cheapest fuel in France, Belgium, Germany, and the Netherlands.