Steve Turner
Former Editor, 5.0 Mustang & Super Fords
February 17, 2008

While we all know the Three-Valve engine is more powerful than the Two-Valve engine, it was interesting to see the '08 Bullitt's promised 312 crank horsepower stack up against the '01 Bullitt's 265 crank horsepower. Fortunately, International Mustang Bullitt Owners Club (www.imboc.com) member Brad Kramer was willing to let us borrow his low-mileage '01 for our testing pleasure.

After driving both cars for an hour to Modular Madness (www.modularmadness.com) in Sarasota, Florida, we let the cars cool for an hour or so while we had lunch. Brad's '01 hit the rollers first. Interestingly its aluminum intake was still fairly warm, while the '08 Bullitt's composite intake had already cooled. We pulled Brad's Bullitt twice and the results were consistent, with the best peak number clocking in at 230.48. The car was stone stock save for a set of Steeda underdrive pulleys.

We followed up with the '08 and it was getting ticks better with each pull as the aluminum block warmed. We ran it three times, and its best peak was 265.11. Using the common 15 percent drivetrain loss calculation, that puts the '01 at 271 at the crank and the '08 at 312 crank horsepower. It sounds about right to us. More interesting is the '01 Two-Valve's bottom-end superiority until about 3,900 rpm. These modern Three-Valve engines are a lot like the old naturally aspirated Cobra Four-Valves, as they obviously pull a lot farther and stronger than the Two-Valves.

RPM'01 Bullitt'08 BullittDifference
POWERTORQUEPOWERTORQUEPOWERTORQUE
2,500122.53257.39115.93243.54-6.60-13.85
2,{{{600}}}129.12260.85123.67249.82-5.45-11.03
2,700134.25261.14130.55253.94-3.70-7.20
2,800138.31259.44135.{{{62}}}254.40-2.69-5.04
2,900143.14259.23141.26255.84-1.88-3.39
3,000147.94259.00144.74253.41-3.20-5.59
3,{{{100}}}154.29261.40148.13250.96-6.16-10.44
3,{{{200}}}161.36264.83151.74249.04-9.62-15.79
3,{{{300}}}169.35269.53157.48250.63-11.87-18.{{{90}}}
3,400175.90271.73{{{164}}}.71254.43-11.19-17.30
3,500181.99273.09174.41261.72-7.58-11.37
3,600186.09271.50183.66267.94-2.43-3.56
3,700191.68272.08191.06271.21-0.62-0.87
3,800198.05273.74197.34272.75-0.71-0.99
3,900203.32273.81204.28275.110.961.30
4,000206.95271.73209.97275.693.023.96
4,100213.93274.04215.87276.521.942.48
4,200216.{{{57}}}270.82223.83279.907.269.08
4,300220.04268.76230.81281.9110.7713.15
4,400222.56265.67236.43282.2213.8716.55
4,500225.65263.37241.79282.2016.1418.83
4,600228.27260.64245.09279.8316.8219.19
4,700229.32256.26248.69277.9019.3721.64
4,800229.13250.71250.99274.6321.8623.92
4,900230.47247.04255.13273.4624.6626.42
5,000229.44241.02258.63271.6729.1930.65
5,100227.6234.38261.37269.1733.7734.79
5,200222.36224.58262.98265.6240.6241.04
5,300222.83220.82264.68262.2941.8541.47
5,400218.48212.51264.84257.5946.3645.08
5,500213.00203.41264.90252.9651.949.55
5,600212.28199.07264.00247.6051.7248.53
5,700n/an/a263.43242.73n/an/a
5,800n/an/a262.43237.64n/an/a
5,900n/an/a261.38232.68n/an/a
6,000n/an/a260.39227.94n/an/a
6,100n/an/a259.81223.7n/an/a
6,200n/an/a258.96219.37n/an/a
6,300n/an/a256.49213.83n/an/a
6,400n/an/a254.02208.46n/an/a