Powered by a 350-hp turbocharged Teledyne Continental Motors TSIOF-550J FADEC (Full Authority Digital Engine Control) engine, the SuperStar has a projected top cruise speed in excess of 200 knots, a range of more than 900 nautical miles and a 25,000 service ceiling. The panel will feature a Garmin G1000 avionics suite
From:
http://www.airventure.org/2007/8sun29/diamond.html
Cont 550 is pretty much the same engine as used in the Columbia 350/400 series.
No reason to doubt that sort of performance.
Curious about the wing design/airfoil used on the DA-50.