October 21, 2026 Farhad Musazada

Kei Truck Top Speed and Gas Mileage: What a 660cc Mini Truck Can Do

By Farhad Musazada, owner of Skyline Kei Trucks. Last updated: October 21, 2026. Based on Suzuki and Honda catalog data, Japanese catalog listings for the Hijet, Acty, Sambar and Minicab, the Japanese 10·15-mode test definition, and Texas, Louisiana and Oklahoma vehicle law; catalog figures and statutes verified October 2026; fuel-economy numbers are Japanese 10·15-mode catalog ratings, not measured U.S. results (sources at the end). General information; figures come from the sources listed at the end. Not legal advice.

Key facts

No official top speed: Japanese catalogs list power, gearing and fuel economy, but no top speed. The yardsticks are Japan's 100 km/h (62 mph) kei expressway limit and the 55 to 65 mph assumed in some U.S. mini-truck laws.
Power: 42 to 50 PS (41 to 49 hp) from 660 cc in the 1999–2001 trucks; 55 to 60 PS (54 to 59 hp) for the turbo Carry and supercharged Sambar; 64 PS (63 hp) for the Jimny, the kei cap.
Catalog fuel economy: 14.4 to 17.0 km/L on Japan's 10·15-mode test, or 34 to 40 mpg. The test averages 14 mph and never exceeds 43 mph, so expect less in Texas.
Fuel: Regular unleaded in every catalog. Japan's 89-or-higher rating and the U.S. (R+M)/2 pump number are different measures; 87 is regular here.
Texas traffic law: No kei-specific speed cap in Texas, but an operator may not drive so slowly as to impede traffic (Transportation Code §545.363). Most owners keep to roads posted 55 mph or less.

How fast can a kei truck go?

Nobody publishes an official number. Suzuki's January 1999 Carry catalog lists output, gear ratios, tire sizes and fuel economy, but no top speed, and the Daihatsu, Honda, Subaru and Mitsubishi listings we checked are the same. So the answer has to be built from what they did publish and from the speeds the law expected.

Start with Japan. Kei trucks were designed for roads with a default limit of 60 km/h (37 mph), and they are allowed on expressways. Until 2000 kei vehicles were held to 80 km/h (50 mph) there; in October 2000 that cap was abolished and they got the same 100 km/h (62 mph) limit as ordinary cars (Japanese Wikipedia, kei car timeline). So every 1999–2001 truck on our lot was designed for 100 km/h, not 60; whether it cruises there comfortably depends on the model, the load and the wind.

Then look at what U.S. legislators assumed. Louisiana R.S. 32:299.2 defines a mini-truck as a reduced-dimension truck "with a top speed of sixty-five miles per hour" and limits it to roads posted 55 mph or less. Oklahoma's titling rule describes a vehicle of 1,000 cc or less, 67 inches or less wide, "having a top speed of approximately fifty-five (55) miles per hour." Those are definitions, not measurements, but they bracket what to expect. Our FAQ says it plainly: comfortable at 45 to 55 mph, best treated as a local-road vehicle.

The speedometer reads km/h, so this is the conversion you will use every day.

Speedometer (km/h)	Road speed (mph)	Reference point
40	25	Residential streets
50	31	City streets
60	37	Japan's ordinary-road limit
70	43	Top speed of the 10·15 test
80	50	Kei expressway cap until 2000
90	56	Just over 55 mph
100	62	Kei expressway limit since 2000

What power and gearing do they have?

By late 1999 every engine here was fuel injected. Outputs are catalog net PS, with horsepower in parentheses (1 PS is 0.986 hp). Curb weights for standard trucks run from 670 kg (1,477 lb) for the lightest Carry to 790 kg (1,742 lb) for a 4x4 Acty, plus 350 kg (about 770 lb) of payload.

Model (1999–2001 versions)	Engine	Output	Transmissions
Daihatsu Hijet S200P / S210P	659 cc EF-SE 3-cylinder	43 PS (42 hp); twin-cam EF-VE 48 PS (47 hp) on some trims	5-speed manual or 3-speed automatic
Suzuki Carry DA52T / DB52T	657 cc F6A 3-cylinder	42 PS (41 hp) carburetor; 50 PS (49 hp) injection; 56 PS (55 hp) turbo	5-speed manual or 3-speed automatic; 4x4 has low range
Honda Acty HA6 / HA7	656 cc E07Z 3-cylinder	46 PS (45 hp)	5-speed manual or 3-speed automatic (2WD only)
Subaru Sambar TT1 / TT2	658 cc EN07 4-cylinder, rear mounted	46 PS (45 hp), 48 PS (47 hp) from August 2001; supercharged 58 PS (57 hp)	5-speed manual (part-time 4x4) or 3-speed automatic (full-time 4x4)
Mitsubishi Minicab U61T / U62T	657 cc 3G83 3-cylinder	48 PS (47 hp)	5-speed manual or automatic

Two factory-boosted trucks fall inside the import window. Suzuki sold a turbocharged Carry from 1997 to May 2000: 60 PS (59 hp) in the 1997–98 DD51T, then 56 PS (55 hp) and 8.0 kg·m (58 lb-ft) in the 1999–2000 DB52T, against 5.8 kg·m (42 lb-ft) for the carbureted engine (Carry buyer's guide; Suzuki catalog, January 1999). Subaru's supercharged Sambar made 55 PS (54 hp) in the 1990–98 KS4 and 58 PS (57 hp) in the 1999–2001 TT2 (Sambar buyer's guide). The Suzuki Jimny, a kei SUV, has a 64 PS (63 hp) turbo, the most the Japanese industry allowed itself (Jimny buyer's guide). No catalog gives a top speed for these either.

Gearing is where a small engine is made to work. Suzuki's 1999 five-speed runs 4.031 in first and 0.855 in fifth, with final drives of 5.857 to 6.833 depending on the version, plus a 1.731 low range in the 4x4 transfer case (Suzuki catalog). A final drive that short is why a kei truck pulls away cleanly with a full bed, and why the engine is spinning fast at 55 mph; the 12-inch 145R12 tires on all five models keep the gearing short too. For low range and diff locks by model, see Hijet vs. Carry vs. Acty vs. Sambar.

What gas mileage do they get?

Japanese catalogs of the era quote fuel economy in kilometers per liter on the 10·15-mode test: a laboratory cycle of 660 seconds covering 4.16 km (2.6 miles) at an average of 22.7 km/h (14 mph) with a top speed of 70 km/h (43 mph) (DieselNet: Japanese 10-15 mode). One km/L is 2.35 U.S. mpg. These are catalog ratings for specific versions (Hijet, Carry, Acty, Sambar); the mpg conversions are ours.

Model and version	10·15 mode (km/L)	Converted (mpg)
Daihatsu Hijet S210P 4x4, 5-speed (1999)	16.0	38
Suzuki Carry DB52T 4x4, 5-speed / automatic (1999–2000)	15.6–16.0 / 15.2	37–38 / 36
Suzuki Carry turbo, 5-speed / automatic	15.8 / 14.4	37 / 34
Honda Acty SDX 2WD 5-speed (1999); HA7 4x4 5-speed (2000)	17.0	40
Subaru Sambar TB / TC 4x4, 5-speed / automatic (1999)	16.2 / 15.2	38 / 36
Subaru Sambar TC Supercharger 4x4, 5-speed / automatic	15.8 / 14.8	37 / 35

We found no catalog figure for the 1999–2001 Minicab, so it is left out rather than guessed.

Real-world figures are lower because the test never goes faster than 43 mph, averages 14 mph and runs in a laboratory with nothing in the bed. The same Suzuki catalog shows how much speed matters by also listing fuel economy at a steady 60 km/h (37 mph): 17.8 to 24.7 km/L, or 42 to 58 mpg. Push the same truck to 55 or 60 mph with 300 lb of feed on board and the number falls the other way. There is no EPA rating for these trucks, and we do not measure fuel economy on our lot. Treat 34 to 40 mpg as a ceiling, not a promise.

How far on a tank?

Tank sizes come from the same catalog listings: Carry 40 L (10.6 gal), Hijet 38 L (10.0 gal), Acty 37 L (9.8 gal), Sambar 40 L (10.6 gal) and Minicab 40 L (10.6 gal) (Suzuki; Hijet; Acty; Sambar; Minicab). Multiply by the 10·15 rating and the range on paper is 608 to 648 km (378 to 403 miles): a Hijet 4x4 at 16.0 km/L on 38 L sits at the low end, a Sambar 4x4 at 16.2 km/L on 40 L at the top.

Those are paper numbers. As a planning example only, a truck that returns 12 km/L (28 mpg) in Texas use would cover about 480 km (300 miles) on a 40-liter tank, and you would want to fill up well before that. On a long day the small tank, not the engine, sets the limit.

What fuel do they take?

Regular unleaded. The Suzuki catalog and the Hijet, Acty, Sambar and Minicab listings cited here all specify 無鉛レギュラーガソリン, unleaded regular, including the turbo Carry. In the United States regular is 87 octane, and the pump shows the (R+M)/2 number, the average of the research and motor octane methods (U.S. Energy Information Administration).

Japan's numbers look different. Its gasoline standard, JIS K 2202, sets regular (No. 2) at an octane number of 89 or higher and premium (No. 1) at 96 or higher (Japanese Standards Association teaching material). That is a single octane number; the U.S. figure averages two tests run under different conditions. They are not the same measure, so do not read Japan's 89 as a reason to buy U.S. 89. The manufacturer asked for regular unleaded, and 87 is regular unleaded here.

Keeping up with Texas traffic

Texas has no kei-specific speed cap and no interstate ban. Two general rules in Transportation Code chapter 545 apply instead (statute text). Section 545.351(a): "An operator may not drive at a speed greater than is reasonable and prudent under the circumstances then existing." Section 545.363(a): "An operator may not drive so slowly as to impede the normal and reasonable movement of traffic, except when reduced speed is necessary for safe operation or in compliance with law." Together they mean: use the truck where it can run with the traffic around it.

We suggest planning routes on roads posted 55 mph or less: farm-to-market roads, county roads and city streets. On a highway posted 70 mph or more, a loaded kei truck is likely the slowest vehicle on the road, which is what §545.363 is written for. Louisiana writes that judgment into its statute; Texas leaves it to you. Our highway FAQ covers other states.

A kei truck cannot be driven on any public road until it is titled and registered, so it leaves our lot on a trailer or with a carrier. The Texas title and registration guide covers the county tax office visit, the VTR-68-A VIN inspection and the fees, and every truck we have is in the kei trucks collection with its engine and transmission listed.

Frequently asked questions

How fast does a kei truck go?

There is no factory top-speed figure for any model. The markers are legal: Japan allows kei vehicles 100 km/h (62 mph) on expressways, Louisiana's mini-truck definition assumes 65 mph, and Oklahoma's assumes approximately 55 mph. A stock 660 cc truck is comfortable at 45 to 55 mph and happiest on local roads.

Can a kei truck go 70 mph on a Texas interstate?

Texas law does not bar a titled and registered kei truck from any road, but §545.363 says you may not drive so slowly that you impede traffic, and a 46 PS truck with a load on a 75 mph highway is the slowest thing out there. We suggest roads posted 55 mph or less.

Do kei trucks need premium gas?

No. Every catalog we checked, including the turbo Carry, specifies regular unleaded. Japan rates regular at 89 or higher, but U.S. pumps use a different measure, (R+M)/2, so the numbers are not comparable. Regular 87 is the right fuel for a stock engine.

What gas mileage does a kei truck really get?

The catalog ratings run 14.4 to 17.0 km/L (34 to 40 mpg) on Japan's 10·15-mode test, which averages 14 mph and never exceeds 43 mph. Texas driving at 50 to 55 mph with a load and the air conditioning on will return less. We do not measure fuel economy on our lot, so treat the catalog figure as the ceiling.

Sources

Written by Farhad Musazada, owner of Skyline Kei Trucks

Farhad imports more than 300 kei trucks a year to Houston and meets buyers at the lot at 6100 Harvey Wilson Dr. He writes these guides from the paperwork our buyers take to the county tax office and the official sources listed on each page. Spotted something out of date? Email us and we will check it.

Ready to look? Browse kei trucks for sale in Houston, see what is in Houston now or arriving soon, or call or text (713) 385-9798.

All vehicles are sold by Wideway Motors LLC as is, with no warranty.