FULL-TIME: Bristol City 1, Hull City 2
Bristol City slipped into the npower Championship relegation zone for the first time this season after suffering a second home defeat inside four days.
Hull joined Blackburn, Leeds and Burnley in winning at Ashton Gate, scoring a goal in each half to carve out their first win in BS3 since 1965.
Some Aluko scored one goal and had a hand in the other as the Tigers deservedly claimed all three points.
Aluko fired the visitors in front after eight minutes, but City equalised through Steven Davies midway through the first half, the in-form striker netting his sixth goal of the season.
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City have won just one of their last 10 games and are now one place off the foot of the table.
But City's defensive frailties resurfaced when Aluko was allowed to shoot in the 65th minute and Robins midfielder Cole Skuse put through his own net.
City were under pressure before a ball had even been kicked after wins for Peterborough United and Sheffield Wednesday saw the Robins drop into the relegation zone for the first time this season.
And things went from bad to worse for the home side when Hull took the lead after just eight minutes.
Despite manager Derek McInnes making five changes in a quest to render his team more difficult to beat, the Tigers waltzed through City's defence with embarrassing ease, Jay Simpson playing a perfectly-weighted return pass into the path of Sone Aluko, who picked his spot from 10 yards out.
You could have heard a pin drop inside Ashton Gate when Egypt international Ahmed Elmohamady surged past debutant left-back Matthew Briggs and tried his luck with an angled shot that was held by keeper Tom Heaton.
City's formation made the team narrow and Hull were enjoying plenty of joy on the flanks and they should have doubled their lead on 22 minutes, Liam Rosenior racing in at the far post and heading inches wide from Elmohamady's right wing cross.
City weathered the early storm and produced an equaliser against the run of play on 25 minutes.
Jon Stead played the ball into Ryan Taylor, who turned Paul McShane and played a penetrating through ball into the path of Stephen Pearson. The Scot had the presence of mind to look up and pick out Steven Davies and the Liverpudlian stroked home his fourth goal in three games to level matters.
Encouraged by that success, City went close from a corner which was headed over by Lewin Nyatanga.
But Hull posed the greater threat and almost profited from another swift counter-attack, Simpson narrowly failing to apply a finishing touch to another Elmohamady centre.
Just as they did in the first period, Hull started the second half the brighter of the two teasm and almost restored their lead when Robert Koren rattled the cross bar with a thunderous drive that had Heaton clawing at thin air.
City responded and Stead was unfortunate to see his low shot deflect off keeper Ben Amos's leg and loop up onto the bar following neat approach play from Davies and Taylor.
Aluko then made his second meaningful contribution of the match in the 65th minute, testing Heaton with a shot which the ex-Manchester United man pushed aside. But Stephen Quinn was on hand to whip the ball back into the mix and Cole Skuse inadvertently bundled the ball into his own net from close range.
Manager Derek McInnes introduced Sam Baldock and Albert Adomah in a bid to rescue the game, but City continued to huff and puff with little end product to show for their endeavour.
Stead saw a shot sail over before making way for Paul Anderson and Taylor came close to snatching an equaliser, only to see his header rebound off the bar.
City (4-4-2): Heaton; M Wilson (Adomah 72), McManus, Nyatanga, Briggs; Foster, Skuse, Pearson; Davies (Baldock 69), Stead (Anderson 82), Taylor.
Hull (3-5-2): Amos; McShane, Chester, Bruce; Rosenior, Elmohamady, Quinn, Koren (McKenna 74), Evans (Olofinjana 86); Simpson (McLean 90), Aluko.
Referee: Fred Barber (Essex)