(of an engine) having four horizontal cylinders, two on each side of the crankshaft.
（发动机）卧式四缸的
Example sentencesExamples
Thanks to the car's lowmounted, flat-four engine, the frontal aspect is nicely aerodynamic and this contributes to the car's impressive overall silence.
The low centre of gravity coming from the horizontal installation of the flat-four engine plays its part here, even though the suspension is markedly softer than that of the saloon.
Here is a car maker ploughing its own proud furrow which it plants with flat-four engines, frameless door windows and four-wheel drive to make an intriguing if unconventional cocktail.
Porsche's revolutionary chassis enclosed an air-cooled, flat-four engine that had originally been designed in 1912 to power World War I fighter planes.
Four-wheel drive and the musical throb of a flat-four engine give great personality.
noun
A flat-four engine.
Example sentencesExamples
Turning the key brings that distinctive sound of a flat-four but it never becomes obtrusive and even when revved hard, it stays as smooth as a sewing machine.
Definition of flat-four in US English:
flat-four
adjectiveˌflatˈfô(ə)r
(of an engine) having four horizontal cylinders, two on each side of the crankshaft.
（发动机）卧式四缸的
Example sentencesExamples
Here is a car maker ploughing its own proud furrow which it plants with flat-four engines, frameless door windows and four-wheel drive to make an intriguing if unconventional cocktail.
Porsche's revolutionary chassis enclosed an air-cooled, flat-four engine that had originally been designed in 1912 to power World War I fighter planes.
Thanks to the car's lowmounted, flat-four engine, the frontal aspect is nicely aerodynamic and this contributes to the car's impressive overall silence.
Four-wheel drive and the musical throb of a flat-four engine give great personality.
The low centre of gravity coming from the horizontal installation of the flat-four engine plays its part here, even though the suspension is markedly softer than that of the saloon.
nounˌflatˈfô(ə)r
A flat-four engine.
Example sentencesExamples
Turning the key brings that distinctive sound of a flat-four but it never becomes obtrusive and even when revved hard, it stays as smooth as a sewing machine.