The 440 cu in (7.2 L) RB was produced from 1965 until 1978, making it the last version of the Chrysler RB block.
It had a light wall construction, precision cast-iron block, with iron heads and a bore of 4.32 in (109.7 mm), for an overall displacement of 440 cu in (7.2 L).

From 1967 to 1971, the high-performance version was rated at 375 bhp (380 PS; 280 kW) (370 bhp (375 PS; 276 kW) in 1971) at 4,600 rpm and 480 lb⋅ft (651 N⋅m) at 3,200 rpm of torque with a single 4-barrel carburetor, and from 1969 to 1971, the highest-output version had an intake setup with 3X2-barrel Holley carburetors ("440 Six Pack" for Dodge, "440 6-BBL."
for Plymouth) producing 390 bhp (395 PS; 291 kW) at 4,700 rpm (385 bhp (390 PS; 287 kW) in '71) and 490 lb⋅ft (664 N⋅m) at 3,200 rpm of torque.

In 1972, changes were made to the horsepower ratings of vehicle engines from gross (engine only, without air cleaner, exhaust system, alternator, or other power-consuming components) to net (with alternator, air cleaner, mufflers, and other vehicle equipment installed).
The new rating system produced lower, more realistic numbers for any given engine.
At the same time, emissions regulations were demanding cleaner exhaust.
Engines including the 440 were made with reduced compression, modified cam timing, and other tuning measures to comply with the newly tightened emissions regulations.
The 1972 440 produced 335 bhp (250 kW) (gross) at 4400 rpm; the new net rating was 225 hp (168 kW)—which very closely coincided with period German DIN ratings and TÜV measurements.

The high-output 440 (4-barrel/mild cam/dual exhausts) was marketed as the Magnum in Dodges, the Super Commando in Plymouths, and the TNT in Chryslers.
From 1972 to 1974 the engine (detuned to run on lead-free gas) was rated at 280 hp (209 kW) net, and dropped in hp each year until 1978, when it was rated at 255 hp (190 kW) (in police specification) and limited to Chrysler New Yorkers, Chrysler Newports, Dodge Monaco Police Pursuits, and Plymouth Fury Police Pursuits.
It was also available in marine and heavy-duty commercial applications until that year.

Vehicles using the RB 440
Chrysler 300 letter series
Chrysler 300 non-letter series
Chrysler New Yorker
Chrysler Newport
Chrysler Town and Country
Dodge B-series vans
Dodge Coronet
Dodge Charger
1970–1971 Dodge Challenger
1969 Dodge Dart
Dodge Charger Daytona
Dodge M-Series Chassis
Dodge Monaco
Dodge Polara
Dodge Ramcharger
1974-1978 Plymouth Trail Duster
1969–1971 Dodge Super Bee
Imperial
1969–1971 Plymouth Barracuda
Plymouth Belvedere
Plymouth Fury
Plymouth GTX
Plymouth Road Runner
Plymouth Superbird
Plymouth VIP
Jensen Interceptor
Monteverdi Safari
1968-197?
Cadillac Gage V-200 Commando (waterproof, export Singapore Armed Forces)
The 440 cu in (7.2 L) RB was produced from 1965 until 1978, making it the last version of the Chrysler RB block. It had a light wall construction, precision cast-iron block, with iron heads and a bore of 4.32 in (109.7 mm), for an overall displacement of 440 cu in (7.2 L).
From 1967 to 1971, the high-performance version was rated at 375 bhp (380 PS; 280 kW) (370 bhp (375 PS; 276 kW) in 1971) at 4,600 rpm and 480 lb⋅ft (651 N⋅m) at 3,200 rpm of torque with a single 4-barrel carburetor, and from 1969 to 1971, the highest-output version had an intake setup with 3X2-barrel Holley carburetors ("440 Six Pack" for Dodge, "440 6-BBL." for Plymouth) producing 390 bhp (395 PS; 291 kW) at 4,700 rpm (385 bhp (390 PS; 287 kW) in '71) and 490 lb⋅ft (664 N⋅m) at 3,200 rpm of torque.
In 1972, changes were made to the horsepower ratings of vehicle engines from gross (engine only, without air cleaner, exhaust system, alternator, or other power-consuming components) to net (with alternator, air cleaner, mufflers, and other vehicle equipment installed). The new rating system produced lower, more realistic numbers for any given engine. At the same time, emissions regulations were demanding cleaner exhaust. Engines including the 440 were made with reduced compression, modified cam timing, and other tuning measures to comply with the newly tightened emissions regulations. The 1972 440 produced 335 bhp (250 kW) (gross) at 4400 rpm; the new net rating was 225 hp (168 kW)—which very closely coincided with period German DIN ratings and TÜV measurements.
The high-output 440 (4-barrel/mild cam/dual exhausts) was marketed as the Magnum in Dodges, the Super Commando in Plymouths, and the TNT in Chryslers. From 1972 to 1974 the engine (detuned to run on lead-free gas) was rated at 280 hp (209 kW) net, and dropped in hp each year until 1978, when it was rated at 255 hp (190 kW) (in police specification) and limited to Chrysler New Yorkers, Chrysler Newports, Dodge Monaco Police Pursuits, and Plymouth Fury Police Pursuits. It was also available in marine and heavy-duty commercial applications until that year.
Vehicles using the RB 440
Chrysler 300 letter series
Chrysler 300 non-letter series
Chrysler New Yorker
Chrysler Newport
Chrysler Town and Country
Dodge B-series vans
Dodge Coronet
Dodge Charger
1970–1971 Dodge Challenger
1969 Dodge Dart
Dodge Charger Daytona
Dodge M-Series Chassis
Dodge Monaco
Dodge Polara
Dodge Ramcharger
1974-1978 Plymouth Trail Duster
1969–1971 Dodge Super Bee
Imperial
1969–1971 Plymouth Barracuda
Plymouth Belvedere
Plymouth Fury
Plymouth GTX
Plymouth Road Runner
Plymouth Superbird
Plymouth VIP
Jensen Interceptor
Monteverdi Safari
1968-197? Cadillac Gage V-200 Commando (waterproof, export Singapore Armed Forces)
Chrysler B engine