Mopar Stock 440 Horsepower & Torque: HP & Standard (All Yrs)

The big block Mopar 440 was one of the most powerful engines Chrysler produced in the 1960s and early 70s. For this reason many people ask, how much HP does a stock 440 have?

The 440 high-performance peaked at 375 horsepower @ 4,600 rpm and 480 ft. lbs. of torque @ 3,200 RPM from 1967-1970. The 440 standard engine peaked at 350 horsepower @ 4,400 rpm and 480 ft. lbs. of torque @ 2,800 rpm.

This article will include the 440 stock horsepower and torque ratings for all the years, 1966-1978. They include the high-performance, standard and California engines.

Mopar Stock 440 Horsepower and Torque: High Performance and Standard Engines (All Years)

The Mopar 440 was produced from 1966 all the way to 1978. During those 13 years some of the engines were high-performance versions and the rest were standard.

The horsepower and torque ratings changed for many of the years. The following chart includes the horsepower and torque for both 440 cubic inch versions and for all the years it was produced.

Year	440 High-Performance	440 Standard
1966	N/A	350 HP @ 4,400 rpm 480 ft. lbs. @ 2,800 rpm
1967	375 HP @ 4,600 rpm 480 ft. lbs @ 3,200 rpm	350 HP @ 4,400 rpm 480 ft. lbs. @ 2,800 rpm
1968	375 HP @ 4,600 rpm 480 ft. lbs @ 3,200 rpm	350 HP @ 4,400 rpm 480 ft. lbs. @ 2,800 rpm
1969	375 HP @ 4,600 rpm 480 ft. lbs @ 3,200 rpm	350 HP @ 4,400 rpm 480 ft. lbs. @ 2,800 rpm
1970	375 HP @ 4,600 rpm 480 ft. lbs @ 3,200 rpm	350 HP @ 4,400 rpm 480 ft. lbs. @ 2,800 rpm
1971	370 HP @ 4,600 rpm 480 ft. lbs @ 3,200 rpm	335 HP @ 4,400 rpm 460 ft. lbs @ 3,200 rpm
1972	280 HP @ 4,800 rpm* 375 ft. lbs @ 3,200 rpm*	230 HP @ 4,400 rpm* 355 ft. lbs @ 2,800 rpm* 221 HP @ 4,400 rpm** 350 ft. lbs @2,800 rpm**
1973	280 HP @ 4,800 rpm* 380 ft. lbs @ 3,200 rpm*	220 HP @ 3,600 rpm* 350 ft. lbs @ 2,400 rpm* 213 HP @ 3,600 rpm** 345 ft. lbs @ 2,400 rpm**
1974	275 HP @ 4,400 rpm* 375 ft. lbs @ 3,200 rpm*	230 HP @ 4,000 rpm* 350 ft. lbs @ 3,200 rpm* 220 HP @ 4,000 rpm** 345 ft. lbs @3,200 rpm**
1975	N/A	215 HP @ 4,000 rpm* 330 ft. lbs @ 3,200 rpm* 210 HP @ 4,000 rpm** 320 ft. lbs @ 3,200 rpm**
1976	N/A	205 HP @ 3,600 rpm* 320 ft. lbs @ 2,000 rpm* 200 HP @ 3,600 rpm** 310 ft. lbs @ 2,400 rpm**
1977	N/A	195 HP @ 3,600 rpm* 320 ft. lbs @ 2,000 rpm* 185 HP @ 3,600 rpm** 310 ft. lbs @ 2,400 rpm**
1978	N/A	195 HP @ 3,600 rpm* 320 ft. lbs @ 2,000 rpm* 185 HP @ 3,600 rpm** 310 ft. lbs @ 2,400 rpm**

440 Big Block Horsepower and Torque Facts

In 1966, the first year of the big block 440 engine, there was no high-performance option available. Therefore, the horsepower and torque specs are for the standard 440 only.

After 1974, there was no high-performance option available on production cars. It was only available on Police packages. Therefore, there is no horsepower or torque specs available for a high-performance engine from 1975-1978.

The high-performance engine had more horsepower due to a higher lift flat-tappet cam for all years, in 1971 more compression and lower restrictions like emissions and exhaust manifolds.

The horsepower and torque numbers remained the same across brands like Dodge, Plymouth and Chrysler.

Muscle Car Gross and Net Horsepower and Torque

In 1972, the Automotive Manufacturers Association began using net horsepower and net torque instead of gross.

Even though compression and emissions were lowering muscle car horsepower, the gross to net change is also responsible for lower horsepower and torque numbers.

This is because net horsepower and torque ratings are lower than gross horsepower and torque ratings for the same engine.

The change in how HP was rated is the greatest reason for the 440 horsepower and torque reduction from 1971 to 1972.

Mopar Gross and Net Differences

Gross horsepower and torque ratings are obtained at the flywheel without allowance for the power absorbed by components like the fan, water pump, alternator and exhaust system. Gross HP is also rated with the optimum ignition setting (manual instead of automatic advance).

Net horsepower and torque ratings are also obtained at the flywheel, but with all of the accessories installed like the fan, water pump, alternator, automatic spark advance and exhaust system.

The change affected all cars, not just muscle cars or Mopars.

Other Mopar Engine Horsepower and Torque Articles:

• 440 Six Pack Horsepower and Torque
• 426 Hemi Horsepower and Torque
• 413 Max Wedge Horsepower and Torque

If you have any questions about the horsepower and torque specs for a Mopar 440, send us an email found specifically on our contact page.

For the past 40 years, I’ve been studying and researching Mopar engines including their horsepower and torque. I assembled my first 440 38 years ago.

More Mopar 440 Engine Articles

Mopar 440 Compression Ratio: All Years

440 Camshaft Specs: HP and Standard (All Years)