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Old 01-01-2015, 10:56 AM   #91 (permalink)
Mechanical engineer
Vekke's Avatar
Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,059

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)

A2 1.4 LPG - '02 Audi A2 1.4 (75hp)
90 day: 28.73 mpg (US)
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Just played around the tool and it would be super sweet if you could add multiple engine efficiency numbers based on speed. You can "easily" calculate those from BSFC maps. Then the calculations would be more accurate at wider range of speeds.

Now in this calculation I know I will get 3 liters at 62 MPH with actual 36% efficiency speed but its off 40 MPH speed. I know the efficiency at 40 MPH in my car will be about 33%. That aint big difference but if you use that 5-200 MPH calculation there start to be some real differences in engine efficiency. I can calculate multiple points and make my own chart but maybe it would be easier if the program would do it automatically if you add your engine efficiency point there?

Aerodynamic & rolling resistance, power & MPG calculator -


Vesa Tiainen innovation engineer and automotive enthusiast
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