There are no avia piston engines left above 500-600HP today, and 1000+hp are completely unheard off. This is why a lot of radial engine powered planes that are

There are no avia piston engines left above 500-600HP today, and 1000+hp are completely unheard off. This is why a lot of radial engine powered planes that are many decades old have no options for new engines if there are no turbine conversion available.