Table of Contents
| P-38 Lightning | A6M Zero | |
|---|---|---|
| Role | Long-range twin-engine fighter, escort and reconnaissance | Carrier fighter built for range and agility |
| Best at | Speed, climb and diving away from a bad fight | Turning at low speed |
| Weak spot | Could not out-turn a Zero below about 200 mph; dive compressibility until flaps arrived in 1944 | No armor, no self-sealing fuel tanks |
| Guns | Concentrated nose battery of four .50 caliber guns and one 20 mm cannon | Navy requirement: two 20 mm cannon and two 7.7 mm machine guns |
| Built | 10,037 | About 10,939 (sources range from 10,934 to 11,291) |
| Who wins | Head-to-head in a fast, energy-fighting engagement | Only in a slow, tight turning fight |
P-38 vs Zero: the short answer
The P-38 was the better fighter in a straight contest, and the Zero was the better turner. Whoever got to choose the kind of fight usually won.
The P-38 could not out-turn a Zero below about 200 mph (320 km/h). Its answer was speed and climb, which let pilots make repeated high-speed passes and leave when the odds turned.
Not the same year
The comparison table above pairs the late-war P-38L with the A6M2 Model 21, the Zero that entered service in 1940. The two did not meet in those exact forms. Use the figures to see each design’s strengths, not to score a single duel.
Speed, climb and ceiling: the P-38 wins
The P-38L tops out at 414 mph (667 km/h). The A6M2 manages 331 mph (533 km/h), so the Lightning could choose when to engage and when to break off.
It also climbs faster, at 4,750 ft/min against 3,090 ft/min, and its ceiling is 44,000 feet (13,400 m) against 33,000 feet (10,100 m). In a fight that meant the P-38 could always find a height advantage.
That advantage is why speed matters more than the spec sheet suggests. For how the P-38 ranks against its peers, see the fastest planes of WWII.
Turning: the Zero wins, but only slowly
The Zero’s weakness-for-weight trade gave it a tight turn. Below about 200 mph the A6M Zero could outturn the P-38 Lightning.
Speed took that edge away. American test pilots found the Zero’s controls very light at 200 mph but stiffer above about 216 mph (348 km/h), and it had no hydraulic boost for its ailerons and rudder, so high-speed maneuvering was hard.
Guns and protection: concentrated fire against a fragile target
All of the P-38’s guns sat in the nose, so they fired along one line and could hit targets at longer range than wing-mounted guns. The classic P-38E fit was four .50 caliber machine guns and one 20 mm cannon.
The Zero’s design requirement was two 20 mm cannon and two 7.7 mm machine guns. Lighter guns are one reason it struggled against the P-38 and later fighters with heavier armament.
The bigger problem was protection. The Zero had no armor for the pilot or engine and no self-sealing fuel tanks, which saved weight but made it prone to catching fire when hit.
Not durable
Older write-ups call the Zero durable. It was the opposite: its agility came from leaving out armor and self-sealing tanks.
Range
On paper the P-38L’s range is 1,300 miles (2,090 km) and the Zero’s is 1,160 miles (1,870 km). Published ranges depend on load and drop tanks, so treat the gap as small.
What mattered was that both could reach targets far from their bases, which suited the long island distances of the Pacific.
What the P-38 got wrong
The Lightning had its own problem. Approaching Mach 0.68 in a dive, the tail shook, the nose tucked under and the controls could lock up.
Dive flaps fixed it, and they were tested in February 1943. They only reached the production line in June 1944, on the last 210 P-38Js.
How they actually fought
The Zero’s lack of protection was found out early. On June 4, 1942, an A6M2 crash-landed on Akutan Island in the Aleutians, and the wreck was recovered and tested at North Island.
Allied pilots then moved to boom-and-zoom dives and the Thach Weave, a pairing tactic that exposed a pursuing Zero to the wingman’s fire.
In boom-and-zoom, a pilot dives on a Zero at high speed, fires a short burst and climbs away. The Thach Weave has two fighters fly about 200 feet apart and turn toward each other when one is attacked. It was first used effectively at Midway.
The P-38 fit those tactics well. It is credited with destroying more Japanese aircraft than any other USAAF fighter, and America’s two top aces flew it: Richard Bong with 40 victories and Thomas McGuire with 38.
On April 18, 1943, 16 P-38Gs flew 435 miles (700 km) from Guadalcanal just above the sea and intercepted Admiral Isoroku Yamamoto’s two bombers and six escorting Zeros. The Americans lost one P-38, and both bombers went down.
The Zero’s early reputation
The Zero’s early legend was partly propaganda. After its first combat over Chongqing on September 13, 1940, Japan claimed 13 Zeros had shot down 27 Chinese fighters without a loss.
Independent accounts say at most four Zeros were damaged. Even so, the type did run up a very lopsided early kill ratio, which Allied pilots took seriously.
The P-38 in Europe
The Lightning’s record in Europe was less clear-cut. By September 1944, all but one of the Eighth Air Force’s Lightning groups had converted to the P-51 Mustang.
That is why its reputation rests on the Pacific, where range and nose guns mattered most.
The P-38’s first Japanese kills came on August 9, 1942, when two P-38Es shot down two Kawanishi H6K flying boats in the Aleutians. Its first combat action in New Guinea followed on December 27, 1942, with the 39th Fighter Squadron.
Bong’s method suited the guns. He flew straight at his targets to be sure of hitting them.
Why is it called the Zero?
The name comes from the Navy Type 0 designation, which refers to the imperial year 2600, or 1940, when it entered service. It has nothing to do with the number of losses.
How many were built?
The P-38 reached 10,037 aircraft between 1941 and 1945. The Zero is usually put at 10,939, though sources run from 10,934 to 11,291.
For the wider picture, see the American fighter planes of WWII and Japanese fighter planes of WWII. We also compare the Lightning with another famous rival in P-38 Lightning vs P-51 Mustang.
Which was better?
The P-38 was the stronger fighter for the war the Pacific became: fast, long-legged and hard-hitting. The Zero was a superb turner that paid for it with fragility, and Allied tactics exploited that.
Pick the P-38 for a fight decided by speed and firepower. Pick the Zero only if the fight stays slow and tight.
FAQ
Sources and references used for research and fact-checking.
About the Author
Tim is the owner and lead editor of AeroCorner since 2019, overseeing aviation content covering aircraft, airlines, airports, and the broader aviation industry. Through years of researching, writing, editing, and publishing aviation-focused content, he has developed extensive practical knowledge of commercial aviation and air travel. Based in Asia and a frequent traveler himself, Tim also brings firsthand passenger experience to AeroCorner’s coverage. Outside of publishing, he has also explored aviation firsthand through hands-on flight training in New Zealand.