[ROVERNET - UK] Re: rovernet Digest, Vol 58, Issue 17

Kent Kinard kkinard at wcc.net
Mon Sep 17 01:46:15 BST 2007

Hi Dave,
No, the 2.5 as used in the TR5, TR250,TR6 and 2.5 saloons was a Triumph 
design and is the direct descendant of the Standard 8, Standard 10, 
Herald, Spitfire,Vangard 6 (but not the four), Vitesse 6, GT6 and 
Triumph 2000 saloon.  Rover built a six based on the P6 four cylinder 
for the P7, but production of the P7 base unit would have required 
substantial retooling, hence the development of the straight five. At 
least one P7 prototype still exists.  The later 2300 and 2600 SD1 
engines were also Triumph designs.  Really quite a nice engine, but had 
top end oiling problems and was underdeveloped.  It shared no parts with 
the 2.5 but did share some architecture with the Dolomite Sprint version 
of the Dolomite/TR7/Saab four.  Wish I had a 2600 as I doubt there are 
any in North America.  There are cures for the top end oiling problem 
and the 2600 SD1's would stay with the V8's until very near the top 
end.  Prototypes had to be de-tuned to keep them from being faster than 
the V8's and, of course, the V8's used taller gears.  I spent some time 
in a very nice 2600 automatic in 1996 and was very impressed.

Kent K.

David Read wrote:

> Netspace wrote:
> <snip>
>> The TC lacks a bit; hence why Rover tried a 2500 5 cylinder motor.  
>> They couldn't fit a 6 in, which is a real pity.
> <snip>
> Didn't the group develop the 6 cylinder motor that powered the Triumph 
> 2.5 series?
> Cheers
> Dave
> South Oz
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