If I remember correctly, in race ready trim, the Cosworth engine based on the aluminum Vega engine was good for roughly 300hp. I forget what the civilized production version in the Cosworth Vega put out. Around 1980 or so I had one of the automotive magazines with a big write up on what Cosworth did to it. Pretty interesting stuff. Based on the Vega's tendancy to self destruct, I'd saw few were manufctured and far fewer actually remain.