Overview
- Horse Powertrain’s B20 was detailed in press coverage on Tuesday, Sept. 8, with the company saying the engine meets IPX8 and can operate submerged to about 1.1 metres (42 inches).
- The B20 is a 2.0‑litre, four‑cylinder turbo designed for HEV, PHEV and range‑extender EV use and is rated by Horse at 188–248 hp and 221–280 lb‑ft of torque while weighing roughly 287 lb.
- Horse says the engine uses a Miller‑cycle layout with direct injection, special pistons and high‑tumble intake ports and claims a thermal efficiency of 48.4 percent.
- Sealing and controls include an aluminium gantry block, integrated exhaust manifold, IPX8‑rated electrical components, sensors and software that alter throttle or limit power when submersion is detected, and a version is already fitted to the China‑market Geely Galaxy Cruiser 700.
- All major technical and efficiency figures come from Horse and have not yet been independently verified, so next steps to watch are third‑party testing, real‑world durability checks and wider OEM adoption.