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can somebody please tell me the ratios for the 306 dt
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With pleasure. For the 1.9 I assume... Figure in brakets is MPH per 1000rpm
1st 0.2894 (4.805)
2nd 0.5348 (8.89)
3rd 0.8709 (14.47)
4th 1.2068 (20.05)
5th 1.5200 (25.27)
Rev 0.3000 (4.98)
Final Drive 0.2539 [16/63]
Hope you find this of some use.
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The power of the internet never ceases to amaze me........that is fantastic information!
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Yeah impressive info, however do you know which age of the 306DT this is for?
Coz my '95M doesnt follow that in fifth!
I get 3000rpm at 79mph not 75.81mph as calculated
Dunno about the other gears. Any ideas why this happens?
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Is that an indicated 79mph? If so, your actual speed could be nearer the calculation result above....
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Ah good call dieselboy, i bet that's it.
A mate of mine claims he gets 82mph, but i think that could be due to a slightly different tyre-wheel size
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Well the gear ratios never changed for the 1.9 turbo XUD engine in the 306, according to the book I got these from.
At an indicated 2750rpm my car is at 70mph, which works out to 25.4mph/1000rpm which is pretty much accurate.
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If we are looking for total accuracy, don't forget that the answer will depend on how much rubber is on your tyres. If new tyres have 7-8 mm and old ones 2-3, that equals a difference of 10mm in diameter or >30mm (well over an inch) in circumference, or about 1½ %.
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