Zero cylinders. Every engine.

Last updated: October 25, 2026

Electric cars are fast and quiet, but they're missing the thrill of an engine revving up, shifting gears and crackling on the overrun. ZeroCyl wants to bring that back.

ZeroCyl (Chinese name 零汽缸, "zero cylinders"; "cyl" is short for cylinder) is a web app. It reads your car's actual speed and acceleration and synthesizes combustion-engine sound in real time: the revs climb as you accelerate, it shifts up automatically at the right point, the exhaust pops and crackles when you lift off, and it settles back to idle when you stop. Your EV has no cylinders at all, yet it can sound like any engine.

Two modes, one tap to switch

• Engine sound: 17 engine styles, from the thunderous burble of the American V8 and the shriek of the flat-plane V8 to the buzz of the rotary. See all 17 engines.
• Speed cameras: based on your location and direction of travel, alerts you to fixed speed cameras, average-speed zones and user-reported mobile speed traps ahead. See how speed camera alerts work.

Both modes share the same driving screen; tap the top of the dashboard to switch. Engine sound mode can also give speed camera alerts, and the engine sound dips automatically while a voice alert plays.

Which cars it works with

• Tesla in-car browser: open zerocyl.app on the center touchscreen. The sound plays through the car's speakers with almost no delay.
• Other EVs: open zerocyl.app on your phone and play it through the car stereo over Bluetooth. The phone version uses the accelerometer to make the sound respond faster, and lets you set Bluetooth delay compensation.

How the sound is made

ZeroCyl doesn't play recordings. It synthesizes each engine in real time from its layout: within one full engine cycle, each cylinder's exhaust pulse has its own timing and strength. Uneven spacing between the two cylinder banks produces the V8 burble, and unequal-length exhausts on opposed cylinders give the flat engine its rumble. On top of that come intake noise, turbos, the blow-off valve, fuel cut during shifts and overrun pops, with the revs and throttle depth worked out from your speed. Because it is synthesized live, the sound changes with your driving and never repeats the same recording.

Our principles

• Every feature is free: there is just one static banner ad at the bottom; subscribe to ZeroCyl Plus to remove it.
• No car maker names: engines are named by style (e.g. "American V8"). We don't use any car maker or model names or logos.
• Driving safety first: the driving screen needs no interaction, and settings lock automatically above 10 km/h. Do not operate your phone while driving.
• Respecting your privacy: no account needed, and no driving routes stored. See the Privacy Policy.

Operator

騏藝逸品有限公司 (Taiwan business ID (統一編號) 96777417)
Contact: service@qiyicrystal.com