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Club Triumph - Cars - TR2-6 - TR4
TR4

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Club Triumph forum - Cars - TR2-6 - TR4 - TR4A bonnet
< Alternator conversion TR4A bonnet TR2/3 potential owner >
"Rick54"
posts: 37
non member
 posted Tue 12th Sep 2017

Hi everyone
I have just purchased a TR4A requiring a deal of restoration ... I am the third person to have owned this car since the restoration started . I am a bit confused about the bonnet. The original bill of sale when it was imported back into the UK says that it includes a TR250 bonnet. In Bill Piggotts Triumph book he says that the TR4A and TR5 bonnets are slightly different with the TR5 bonnet having a slightly longer power bulge. However I cant see any differences in any of the photos I have seen of both these cars.

Can any one help?


Triumph TR4A ..... also in boxes ... still not learning!
Austin Healey Sprite bought in boxs ... when will I learn!
67 Chevy Camaro body restoration finished
Mk 2 GT6 Just restored
MGA roadster ..... gorgeous

remember if you cant fix it with a hammer .... its an electrical problem
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"garyf"
posts: 1397
non member
 posted Tue 12th Sep 2017 reply 1 of 5

I'm still learning my way with the TR Range but have read you can get a Short and Long Bulge Bonnet.

I believe the early TR4's had the short Bulge, the later 4a & 5 cars the long bulge.

There is a short bulge Bonnet listed for sale on the TR-Register For Sale section?
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"garyf"
posts: 1397
non member
 posted Tue 12th Sep 2017 reply 2 of 5

A Couple of Photo's of the Short Bulge bonnet for sale on the TR Register site, I know the bonnet support box sections are different on the TR5 they are angled across the bonnet not front to back as this one?  
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"garyf"
posts: 1397
non member
 posted Tue 12th Sep 2017 reply 3 of 5

Here's the underside of a TR5 Bonnet?
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"Hogie"
posts: 1202
North London & Herts group
joined on Fri 2nd Oct 2009
 posted Tue 12th Sep 2017 reply 4 of 5

Hi Rick,
              the very early TR4 had a short bulge as shown in Gary's photo.
These bonnets were prone to cracking at the sides in line with the back of the bulge.

These were superseded by the long bulge on the TR4/4A/5 which also had the slanted internal rib.

The short bulge is period correct for very early TR4's but must be modified with a support bracket in each corner.
Even the 4A and 5 should also be suitably supported.

The old fashioned method of slamming the bonnet shut is NOT a good idea on these very long bonnets.

Roger

 TR4A 1967 daily(ish) driver
TR4  1962  having surgery at present
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"Rick54"
posts: 37
non member
 posted Thu 14th Sep 2017 reply 5 of 5

Many thanks for all of your replies.
I have the bonnet without the corner strengtheners  but with the slanted strenthener so I guess that it is a latish TR4A / TR5 in which case I think will do just dandy for the car
cheers
Rich
Triumph TR4A ..... also in boxes ... still not learning!
Austin Healey Sprite bought in boxs ... when will I learn!
67 Chevy Camaro body restoration finished
Mk 2 GT6 Just restored
MGA roadster ..... gorgeous

remember if you cant fix it with a hammer .... its an electrical problem
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6


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