Eight Four Suited vs Ace Two Suited

At the flop:
Winning 29.83% of the time
Tied 0% of the time
Losing 70.17% of the time

At the Turn:
Winning 36.37% of the time
Tied 0% of the time
Losing 63.63% of the time

At the River:
Winning 41.52% of the time(15.47% with trips or better)
Tied 0.56% of the time
Losing 57.92% of the time(2.83% with trips or better)