1994 1955 1995 Ford Thunderbird LX V8 Classic Laser Red Paint Black

The 1991-1997 V8 Ford Thunderbirds came with two different engines depending on the model year. The early 1991-1993 models came with 5.0L V8s. After 1993, the engine changed to a Modular 4.6L V8, which was similar to the 1996 Mustang GTs. As you can see from the below, the performance changed slightly between each engine and Modular design.

4.6L Specs 5.0L Specs
Engine 90 degree V-8 90 degree V-8
Displacement 281 cubic inches 302 cubic inches or 4,942 cubic cm
Valve train 2 Overhead camshafts driven via chains One in block camshaft driven via chain
Valves 16, 2 per cylinder 16, 2 per cylinder
Cylinder heads Cast-aluminium Cast-iron
Cylinder block Cast-iron with a 4-bolt main Cast-iron with 2-bolt main
Bore X Stroke 3.552 x 3.543 inches 4.00 x 3.00 inches
Compression ratio 9.0:1 9.0:1
'94-'95 HP & TQ SAE-net 205 hp @ 4,500 rpm
265 lbs.-ft. of torque @ 3,200 rpm
200 hp @ 4,000 rpm
275 lbs.-ft. of torque @ 3,000 rpm
'96-'97 HP & TQ SAE-net 205 hp @ 4,250 rpm
280 lbs.-ft. of torque @ 3,000 rpm
'99 Mustang HP & TQ SAE-net 260 hp @ 5,250 rpm
302 lbs.-ft. of torque @ 4,000 rpm

Which engine is best is up for debate. The early 5.0L engines have a large aftermarket due to its Mustang roots. The 1994-1995 Modular is based off of the 1991 Lincoln Town Car design and is very durable. The only issue with the early Modulars is oil burning due to bad valve stems. The 1996-1997 models suffer from problems with the intake manifold coolant leaking, but they make a P.I swap easier then the early version.

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