PORT Adelaide has locked in a top-four spot with a 22-point win over Adelaide, in what was a spicy contest at Adelaide Oval on Saturday night.

Showdown medallist Zak Butters (42 disposals, 10 clearances) and captain Connor Rozee (28, nine) starred in the Power’s victory, earning a finals double-chance for the fourth time in five seasons.

The result also snapped Port's three-match losing streak against the Crows and levelled the overall record between the South Australian rivals at 28-28.

Jason Horne-Francis was influential with 23 disposals, eight clearances and two goals, while Willie Rioli (three), Francis Evans and Darcy Byrne-Jones (two each) also kicked multiple majors.

Butters, Rozee, Ollie Wines and ruckman Jordon Sweet led Port to a convincing 52-38 win in clearances.

Matt Crouch (29 touches), Jordan Dawson (26) and Rory Laird (24) were all busy for Adelaide as Izak Rankine and Darcy Fogarty kicked two goals each.

Power fans jeered Josh Rachele after lighting the pre-match fuse on Adelaide radio when he claimed Port supporters 'don't have many teeth' and they were also incensed by a one-sided free-kick count - 7-1 at one point - in the opening stages as the Crows led by two points at quarter-time despite Port's clearance control.

A stoppage win through Sweet's expert tap led to a brilliant Horne-Francis goal from the forward pocket, which opened the scoring in the second quarter.

Darcy Fogarty and Riley Thilthorpe made it three consecutive Crows goals and they led 6.6 to 4.9 at the main break.

A tight third quarter exploded when Dan Houston collided with Rankine and Port kicked the only two goals of the term to snatch a two-point lead by the final change.

Rankine was eventually helped to his feet and driven off the ground on a medical cart with concussion.

Willie Rioli and Jase Burgoyne both kicked majors from the goalsquare early in the last quarter to give the Power breathing space and they were a class above when it mattered.

Port has now won seven of its past eight games ahead of a final-round clash with Fremantle at Optus Stadium, while Adelaide will complete its year against ladder leader Sydney at the SCG.

PORT ADELAIDE    2.3    4.9    6.12     11.14 (80)
ADELAIDE            2.5    6.6    6.10     8.10 (58)

GOALS
Port Adelaide: Horne-Francis 2, F. Evans 2, Byrne-Jones 2, Rioli 2, Boak, Burgoyne, Butters
Adelaide: Rankine 2, Fogarty 2, Rachele, Thilthorpe, Hinge, Keays 

BEST
Port Adelaide:  Butters, Horne-Francis, Rozee, Wines, Burgoyne
Adelaide: Dawson, Crouch, Hinge, Laird

INJURIES
Port Adelaide: Jones (Achilles soreness)
Adelaide: Rankine (concussion), Worrell (TBC) 

SUBSTITUTES
Port Adelaide: Quinton Narkle (replaced Lachie Jones in the third quarter)
Adelaide: Zac Taylor (replaced Izak Rankine in the third quarter)

Crowd: 52,459 at Adelaide Oval