TVR AJP V8 General Information
For
build photos of this 4.8 litre engine we recently built, please
click
on the Gallery page link on the navigation menu at the top
of this page.
The AJP was designed by Al Melling
for TVR back in the early 90s
and the first engine was seen in Peter Wheelers Tuscan challenge car in 1994. This was a 4.2
Litre engine, which was destined for the new Cerbera that first appeared in
1996.
The capacity was increased on later engines to 4.5 litre. The design is an all-aluminium V8, with a compression Ratio of10.5 to 1.
TECHNICAL SPECIFICATION
Cylinder Heads
Single overhead camshaft
bucket tappets shim valve adjustment
Camshafts run opposite rotation to
the engine
Camshaft lift .500 thou Inlet and
Exhaust, Duration 290 Degrees Both
Valve Sizes Inlet 45mm or 1.771 inch
Exhaust 36mm or 1.417 inch
Block Assembly
Block 70 Degree V Angle
Bore 4.2 engine 88mm or 3.465 inches
4.5 engine 91mm or 3.583
Stroke Both engines 86mm or 3.386
inches
Pistons/Rods
Pressure cast pop up type fully
floating pins
Conrods forged with cap screw bolts
Crankshafts
V8 Flat plane design material cast
iron
Journal sizes 4.2 big end journals 2
inches main journals 2.3 inches
Journal sizes 4.5 big end journals 2
inches main journals 2.5 inches
Things to Be Aware Of...
Some later 4.2s were actually 4.5
blocks with 4.2 induction systems on them.
Some of the 4.2 crankshafts were
known to break on the main journals
Power outputs standard engines
The 4.2 was 340 BHP @ 6500 rpm 320 FT
LBS Torque @ 5000 rpm
The 4.5 was 360 BHP @ 6500 rpm 340 FT
LBS Torque @ 5000 rpm