Mini V8 Engines That Run on Gas: What They Cost and What You Need

The Short Answer: About $1,100 and Up

On September 28, 2026 we went through the full catalogues of Stirlingkit and Enginediy, two of the main specialist retailers of running model engines, and listed every V8 that burns fuel. The cheapest was the Toyan FS-V800WGPC petrol version at $1,099.99 for the engine alone, at both retailers. Toyan's nitro version cost $1,799.99, and every other V8 in stock started at about $2,100.

That price floor is the most useful fact on this page. A miniature V8 that genuinely runs on petrol has eight working cylinders, valves, a spark ignition and a cooling system machined at a tiny scale. It cannot be made for $30 or $300. A listing at those prices that says the V8 "runs" is describing an engine driven by a battery and a motor.

The Four Engines Side by Side

All four are four-stroke, water-cooled and run on 92-octane or better gasoline. Figures are the retailers' own, from Enginediy's and Stirlingkit's product specifications. A dash means the retailer does not state it.

How to Tell a Real One From a Mislabelled Listing

The word "runs" in a listing tells you nothing on its own. A building-block V8 on Amazon is titled "Mini V8 Engine kit that Runs", and it does, on a battery. Buyers ask on forums whether cheap miniature four-strokes are a scam, for example in this thread on Pilots of America. These are the details that separate a real combustion engine from a motorised model:

• Displacement in cc. A real engine lists it, usually per cylinder as well: "28 (3.5 × 8) cc". A display model has no displacement to list.
• A fuel and an oil specification. Every engine above names the octane and the engine oil. A motorised model names a battery.
• Ignition. Look for CDI ignition, a distributor or spark plugs. A model with none of them cannot burn anything.
• Cooling. Petrol V8s at this scale are water-cooled and need a radiator or water supply. A display model needs no cooling.
• A starter. These engines are spun into life by a separate starter motor, powered from a LiPo battery or a 12–24V supply, not switched on with a button on a battery box.
• The price. Below about $1,100 for a V8, assume it is electric until the listing proves otherwise.
• What the seller says outright. The better retailers are explicit. One describes its $699 metal V8 as "an electric-powered working engine model, not a fuel-powered engine".

If you want an electric V8 to build and display, that is a perfectly good choice — see our guide to the best V8 engine model kits. Just buy it knowing what it is.

What Is Not in the Box

The advertised price is rarely the price of a running engine. From the retailers' own listings:

• Toyan: the $1,099 kit is the engine only. The retailer states that ignition, starting and water-cooling parts are bought separately. Sets with a starter kit and stand cost up to $1,449 as a kit, or $1,549 pre-assembled.
• Cison 44 cc: the $2,099 price is the engine only. The full set with base and starter kit is $2,295.
• Cison LS-52: the ignition system, all eight spark plugs, the 12V starting battery and the oil filter are not included.
• Enjomor: the dedicated starter and ignition kit is sold separately, and the engine needs a 24V supply to start and 12V for the ignition.

Budget for fuel, two-stroke or four-stroke oil as specified, a starting battery or power supply, and a stand or base if one is not included.

Running One Safely

These are real internal combustion engines, and they come with everything that implies: petrol, exhaust gas, heat, noise, and parts turning at up to 12,500 rpm. Run them outdoors or somewhere with serious ventilation, never in a closed room, and keep fuel and a fire extinguisher suitable for petrol well apart from the engine. The makers rate them from 14+ (Toyan) to 18+ (Enjomor).

Break-in, fuel mixing, starting and cooling are covered step by step in our guide to running a miniature IC engine. Read it before the engine arrives, not after.

Which One to Choose

Your first running V8: the Toyan. At $1,099 for the engine it is by far the cheapest real petrol V8, and it can be bought pre-assembled if you want to run it rather than build it. Budget for the starting, ignition and cooling parts on top.

More size and power: the Cison 44 cc small-block, at about 4.8 hp. Buy the full set rather than the engine only unless you already have a starter and a base.

The most power in a kit: the Cison LS-52, at about 6 ps and 12,500 rpm, provided you are prepared to source the ignition, plugs and battery yourself.

The biggest engine, no build: the Enjomor GS-V8 PRO, the only engine here listed as DOHC, supplied assembled and rated 18+.

What We Could Not Verify

We have not run these engines. Every specification comes from the retailers' product data, checked on September 28, 2026:

• Power and rpm figures are the makers' own and are not independently measured. The Enjomor's power figure was not legible in the listing, so we have left it out.
• Stock: all four engines were listed as available. Enginediy describes the Toyan V8 as a presale, so check the shipping date before ordering.
• Noise, fuel consumption and run time are not documented for any of them.
• Other retailers may sell the same engines at different prices; we compared only Stirlingkit and Enginediy.