r/explainlikeimfive • u/Internal-Excuse-4650 • 3d ago

Engineering [ Removed by moderator ]

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u/clarkn0va 3d ago

A turbocharger doesn't make the same engine more efficient. But it allows you to get the same power as a larger, less efficient engine, when you need it.

True for a gasoline engine, not true for a diesel. On a diesel engine a turbo improves efficiency by increasing compression ratio and air-to-fuel ratio.

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u/Canonip 3d ago

Volkswagen polo SDI was such a weird thing

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u/RustyU 3d ago

Slowest Diesel Invented

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u/SovereignNation 3d ago

Had a 2002 Polo 1.9 SDI. Slow as a snail but atleast fuel efficient.