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2003 Ford Mustang Specs, Horsepower, & Features

Created by Taylor Ward
Last Updated 5/17/2021

Do you ever find yourself searching for the factory specs on your 2003 Ford Mustang? If so you have definitely come to the right place!

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2003 Ford Mustang Specs, Horsepower, & Features - 2003 Ford Mustang Specs, Horsepower, & Features

2003 marked a big year for the Mustang. A stand-out for the V6 models were the Mustang pony package. This pony package combines 16-inch, polished-aluminum wheels, unique stripping with "Mustang Stampede" graphics, a special rear bumper with blackened "Mustang", GT hood and scoop, and a leather-wrapped steering wheel. The all-new Mach 1 was debuted featuring a 305HP DOHC V8 and a functional shaker hood scoop. The SVT Cobra was reinvented and featured a supercharged 4.6L DOHC V8 that produced 390HP out of the box. Both of these new designs helped the Mustang become what it is today!

Exploring more of the 2003 Mach 1, the engine makes use of specially calibrated cams, modified upper intake to accommodate the ram air system, a forged crank, and performance exhaust manifolds. For the suspension, the Mach 1 was lowered a 1/2" and is equipped for a firmer suspension for improved handling. This new handling package included new front and rear coil springs with adapted load and rate, shocks and struts, unique stabilizer bars for the front and rear, and added frame connectors. Mach 1 colors included black, dark shadow grey, zinc yellow, azure blue, torch red, and oxford white.

Going in-depth with the 2003 Cobra, the widely loved V8 engine was equipped with an Eaton supercharger and new aluminum-alloy cylinder heads. This engine was also built on a cast-iron block that contains the carryover forged-steel crankshaft. This was fitted with the new Manley forged "H-beam" connecting rods, forged pistons that were similar to the SVT Lightning, and an aluminum flywheel that was similar to the 2000 SVT Cobra R's.

Check out our 2003 Mustang specs below!


2003 Ford Mustang Engine Specs

Engine Options Engine Bore Compression Horsepower Torque Fuel Tank
3.8L V6 3.81 x 3.39 inches 9.36:1 190hp 220 ft-lbs 15.7 gal.
4.6L SOHC V-8 3.55 x 3.54 inches 9.0:1 260hp 302 ft-lbs 15.7 gal.
4.6L DOHC V8 (Mach 1) 3.55 x 3.54 inches 10.1:1 305hp 320 ft-lbs 15.7 gal.
4.6L DOHC V8 (Cobra) 3.55 x 3.54 inches 8.5:1 390hp 390 ft-lbs 15.7 gal.

2003 FORD MUSTANG EXTERIOR PAINT & INTERIOR TRIM OPTIONS

Exterior Paint Options Paint Code
Zinc Yellow B7
Torch Red E9
Laser Red ES
Sonic Blue SN
True Blue L2
Dark Shadow Grey CX
Tropic Green SU
Redfire G2
Mineral Grey TK
Black UA
Silver YN
Oxford White Z1
Azure Blue L5
Interior Color Options Color Code
Medium Parchment H
Medium Graphite 2
Dark Charcoal W
Oxford White Z

2003 FORD MUSTANG Curb Weight

Model Curb Weight
3.8L V6 Coupe 3,066 lbs
3.8L V6 Convertible 3,208 lbs
4.6L V8 Coupe 3,241 lbs
4.6L V8 Convertible 3,379 lbs
Cobra Coupe 3,665 lbs
Cobra Convertible 3,780 lbs
Mach 1 3,465 lbs

2003 FORD MUSTANG Production Numbers

Model Units Sold
2003 3.8L Coupe 59,943
2003 3.8L Convertible 26,500
2003 4.6L Coupe 26,955
2003 4.6L Convertible 17,135
Cobra Coupe 6,600
Cobra Convertible 4,110
Mach 1 19,652

2003 FORD MUSTANG Transmission Options

Engine Transmission Options
3.8L V6 T-5 Manual/4R70W 4-Speed Automatic
4.6L SOHC V8 TR-3650 Manual/4R70W 4-Speed Automatic
4.6L DOHC V8 (Mach 1) TR-3650 Manual/4R75W 4-Speed Automatic
4.6L DOHC V8 (Cobra) T-56 Manual