Quote:
Originally Posted by Baltothewolf
I have never seen a factory turbo car that has the same gearing ratio as the NA version. The turbo version always has a shorter ratio to make it feel more 'sporty'. Thus, Killing the mileage. Also no manufacturer in the past has economy in mind when tuning the ECU and other systems on a turbo version.
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I believe that you are talking about cars, which have seen the daylight a long time ago. Those old turbos used to be weak a low revs and needed short gearing to compensate their weakness. Modern turbo engine are strong at low revs and have virtually ALWAYS taller gearing than a comparable NA engine.
Here is a list of 1 liter engined cars from years 2015-2016. Speeds at 1000 rpm at the tallest gear are:
Turbo:
Ford Focus - 41.2 km/h
VW Golf - 44.4 km/h
Kia Cee'd - 44.6 km/h
Opel Corsa - 45,5 km/h
NA:
Hyundai i10 - 31.1 km/h
Renault Twingo - 33.5 km/h
Peugeot 108 - 37.1 km/h
Toyota Aygo - 35.1 km/h
Let's take some examples from the year 2013.
Turbo:
Audi A3 1.4 - 46.9 km/h
BMW 320i - 56.7 km/h
VW golf 1.2 - 44.4 km/h
NA:
Honda Civic 1.8i - 37.2 km/h
Mazda6 2.0 - 41.2 km/h
It is very clear, that turbo means taller gearing.