Lukaku has already run riot in the Premier League with six goals in as many matches and seems to be improving with each and every game, and is already an early contender to win the Golden Boot this season.
It's taken him just nine games with his new club to reach double figures and, like numerous club's supporters, Roy Keane has been impressed with what he's seen so far from the Belgian global at United.
"You can't look at United or judge them compared to how they were 10 years ago, when we last won the Champions League".
He added: 'The big tests for Lukaku will come in the big games.
The Treble-winning skipper watched United produce another emphatic display as they thrashed CSKA Moscow 4-1 in Russian Federation to serve notice they are a force once again in Europe.
I think he was a bargain at £75 million - it was obvious he was going to score goals. "United haven't had to play anyone big yet, while you can only beat what's in front of you". The striker spun a pass that was weighted perfectly into Martial's path, who cut inside and dropped the ball for Lukaku to head in.
Speaking on ITV's Champions League highlights show, Roy Keane more than agreed with presenter Mark Pougatch that Man Utd are a different side this season. "He was always going to score goals in the Premier League, speaks well and comes across as a decent character".
Keane believes that Manchester United are ready to challenge for the Premier League title once again and suggested their in-form striker Romelu Lukaku is on course to hit 30 goals this season after his latest brace in the Champions League.
"He's gotten off to a good start", continued Keane.
"We have started competitions strong in August and September and have now just one more game, a hard one". They face Crystal Palace on Saturday.
Aurora theater shooter transferred to federal prison
Holmes was moved from Colorado due to threats from another inmate, AP reports, but officials did not disclose where he was taken. Holmes is serving a life sentence for the July 20, 2012 attack that killed 12 people and left more than 70 others injured.