1967 Triumph TR4A Specification and History

1967 Triumph TR4A
1967 Triumph TR4A
Built in 1967, towards the end of the production run - the TR4A was a variant of the earlier Triumph TR4. 

 

The main differences are; Independent Rear Suspension (hence the IRS badge on the boot lid), walnut veneer dash and the handbrake was moved to the top of the transmission tunnel, instead of in the footwell next to the driver's left leg. 

 

It is fitted with the Surrey Top, which consists of a rigid rear window with removable roof panel and separate soft-top and frame.

 

The engine was the same 4 cylinder 2,138 cc engine as in the earlier TR2s and TR3s, but with a revised head and exhaust, giving slightly more power.  This is a slow revving engine with lots of torque and an agricultural feel (not surprising as it was derived from a Massey Ferguson tractor engine).  The manual gearbox has synchromesh on all four gears and is fitted with overdrive that works on 2nd, 3rd and 4th gears – effectively giving it 7 gears.

 

Production:        TR4a - from January 1965 to 1967 - 28,465. 

                           Price when new - £1200 approx.

Construction:

 

Steel chassis with steel body bolted on separately. All four wings bolt on to the inner wings. 
 

History of RWP 400F:  

 

Owned from new by one man, Ken Westwood.  It was featured in the Bill Piggott book Original TR, and the David Hodges book, Essential TR.  Since we acquired it at the end of 1998, the body panels have been dismantled, some minor rust damage repaired and the car has been re-sprayed in its original Royal Blue.  The interior (still in its original midnight blue) has been cleaned.  The brakes and suspension have been overhauled.  The engine is still original and has done over 130,000 miles - hence the apparently low mileage, as it has been round the clock once!

 

To avoid the problem of the dynamo not charging properly at idle speeds, or when under high electrical load (like using lights and wipers in the rain), in 2003 we replaced it with an alternator which now produces more than enough electrical power.  The gearbox, overdrive and differential were rebuilt in 2005.

 

Technical: 

  

  • Engine 2,138cc Standard Vanguard engine with wet liner cylinders and overhead valves operated by a single camshaft and pushrods.
  • Develops 105bhp at 4,700 rpm and 132 lb ft of torque at 3,000 rpm. 
  • Twin SU HS6 1 ¾ inch carburettors.
  • Manual 4 speed, all synchromesh gearbox with overdrive on 2nd , 3rd and 4th
  • Disc brakes on front & drums on rear.  
  • No servo assistance.  
  • We use ‘Green Stuff’ brake pads as they are about 20% more ‘grippy’ than standard brake pads and they produce less brake dust. 
  • Front suspension: double wishbones, coil springs, telescopic shock absorbers with anti-roll bar.
  • Rear suspension: independent with cast aluminium semi-trailing arms, coil springs and lever arm dampers.
  • Steering: Rack & pinion with 3½ turns lock to lock.  
  • The original 16 inch steering wheel tends to rub across the drivers’ knees, so it has been replaced with a smaller diameter, but thicker Mountney wheel.  
  • Wheels: Bolt on MiniLite alloy wheels with 165/15 radial tyres. 
  • Tyre pressures (pounds per square inch): Front 24, Rear 28.
  • 0-60 in 11.4 secs. 
  • Top speed 109mph.


 
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