In reply to Rodger Bramham:
Without seeing your old bike it's hard to be specific but improvements should be
Probably Lighter - easier on the hills.
Newer frames tend to be stiffer so more efficient
You'll find braking far better and less effort needed with modern Ultegra brakes and you'll feel more comfortable speeding downhill if you have more confidence in your brakes.
Probably much more precise and smoother gear shifting.
If your old bike is old enough to have downtube shifters you'll find indexed shifters on the brakes way better.
I'd like to say faster but that's down to the rider in the end although you probably will find it feels a bit quicker for the same effort.