[Mgs] Overdrive Numbers

[Charles & Peggy Robinson]

   Tell John Twist.  He thinks overdrives are strictly "feel good" add-ons.

   CR


Paul Hunt wrote:
> There's been quite a shift in perception since, then, and that must have 
> been the view for the whole of MGB production i.e. nigh-on 20 years.  From 
> what I hear from that side of the pond now the common view now is that 
> overdrive is a very good thing for driver comfort and for the engine.  The 
> fuel issue is barely mentioned, in fact it is often said that overdrive 
> makes no difference to mileage.  I don't believe that to be the case, by the 
> very fact that the engine is turning slower and giving less bangs per mile 
> and per minute you must be using less fuel, unless you have to drive with a 
> larger throttle opening to maintain a given speed in OD 4th as straight 4th, 
> which certainly isn't the case on any MGB I have driven.  If one accepts 
> that you get better mileage in 3rd and 4th, one must also accept that one 
> gets around half that improvement in OD 4th compared to 4th.
> 
> PaulH.