gas-powered

Audiが天然ガスで走る自動車A3 Sportback g-tronをジュネーブモーターショーで発表しました。gasには（特にアメリカ英語で）「ガソリン」という意味がありますが，言うまでもなく，記事のgasは「（燃料用の）ガス」という意味。記事では「ガソリン」をpetrolで表しています。今後「ガス自動車」が普及すれば「ガソリン」という意味でgasが使われる機会は減少するのかもしれませんね。（Koyamamoto）

A gas-powered Audi A3 Sportback has been unveiled at Geneva, and it emits only 30g/km of CO2
This is the Audi A3 g-tron, and it has been unveiled at the Geneva Motor Show.
It’s a gas-powered version of the new Audi A3 Sportback, equipped with two gas tanks stored under the boot floor and powered by a modified version of the manufacturer’s 1.4 TFSI engine.
Each gas tank is capable of holding 7kg of gas stored up to 200bar. And even when full, they’ll weigh 27kg less than a petrol or diesel tank found in a regular car.
The g-tron’s engine produces 108bhp and 200Nm torque, enough to get it from 0-62mph in 11 seconds and on to a top speed of 118mph.
The g-tron will work with ordinary compressed natural gas, but Audi has designed it to run on e-gas – a carbon neutral synthetic gas created at the firm’s plant in Welte, Germany.
Audi claims the car will do 17.7miles per kg of gas, has a range of 242 miles and an emission figure of just 30g/km – even with the emissions created to construct the firm’s e-gas factory taken into account.
http://www.autoexpress.co.uk/audi/a3/62941/audi-a3-g-tron-revealed