1994 Chevrolet 5.7 efi have for horsepower?

The horsepower for a 1994 Chevrolet 5.7L EFI engine varied depending on the specific application (truck, van, etc.) and options. There's no single answer. You'll need to find the specific engine code (often found on a sticker under the hood or on the engine itself) to get a precise horsepower rating from a factory specification chart or repair manual. However, you can expect a range of approximately 200-230 horsepower.