Head coach Denis Betts lavished praise on his side's defensive efforts after Widnes saw off the challenge of the London Broncos 28-14 at The Stoop.
Widnes raced into an 18-0 interval lead and then contained the hosts in a see-saw second half to get their Super League campaign off to a flyer.
Betts said: "Defensively we were outstanding today and that was the big factor for us.
"We had to get through a lot of work and I was really pleased to see how hard the players worked for each other.
"That was really important for us as I did not think we did that well attacking-wise. But when we did create opportunities we took them.
"The key though was the attitude and that is something we are trying to breed among all the players at the club.
"We do have good players that are going to come back from injury, but everyone is fighting for their shirt at the moment and that is great to see."
Stefan Marsh got the Vikings on the board on six minutes, cutting inside to leave the home defence flat-footed.
Further first-half scores followed from Jon Clarke and Dave Allen as Widnes took advantage of some woeful attacking play from the Broncos.
After the break London stepped up a gear with tries from Kieran Dixon (two) and Chris Melling, but Vikings scores from Frank Winterstein and Marsh again ensured they were nothing more than mere consolation.
With his side tipped for bigger things this campaign, Broncos coach Tony Rea cut a frustrated figure after the game.
He said: "There are a different set of expectations at the club now compared to last season. We want those expectations, but we have to learn to deal with them.
"We didn't deal with them today and I was surprised by the error count. We must not dwell too much on this result, as all this tells us is how we performed today.
"We have to take a look at the game, look for solutions to the problems and find those solutions fast."
Stefan Marsh scored two tries as Widnes Vikings secured a 28-14 victory over the London Broncos.
Marsh impressed throughout as Widnes ran in five tries to get their Super League campaign off to a perfect start.
The visitors finished with the wooden spoon last season but they set about putting that right straight from the off, grabbing an early lead when Marsh took Jon Clarke's pass, cut inside and muscled over from close range.
It was Widnes who were to move further clear on the half-hour, Clarke engineering space and romping over after neat hands from the Vikings backs.
And the away side moved into a commanding position before the break, Dave Allen cashing in with a third try after the Broncos spilled an aimless kick on the last tackle.
Tony Rea's men finally got on the board on 64 minutes, profiting from a loose pass that went to ground with Kieran Dixon scooping up and skidding home.
Further late scores saw Frank Winterstein rumble home for the visitors and Chris Mellingand Dixon burst over late on for the Broncos, Marsh rounding off the scoring.
Tony Rea begins another permanent reign in charge of the London Broncos with a fixture against the Widnes Vikings to start the 2013 Super League campaign.
The Londoners finished the 2012 season with momentum following Rea's arrival after Rob Powell sacking with the team bottom of the top-flight ladder.
Rea could hand league debuts to new signings Tommy Lee and Alex Hurst for the visit of the Vikings, who finished bottom of the Super League table in 2012.
Lee joined from the Huddersfield Giants while Hurst is formerly of the Swinton Lions. Former Australia international Craig Gower captains the side.
"All the 19 are capable with Tommy Lee and Alex Hurst potentially making their debuts," said head coach Tony Rea. "It's what they do with the shirts that count.
"Everyone has worked hard and we're looking forward to a contest. We know what we've got to do."
Widnes have been busier than most during the close-season with Kevin Brown and Gareth Hock joining Denis Betts' team.
Hock, who is on a season-long loan from the Wigan Warriors, and Brown however will both sit out Sunday's clash.
Eamon O'Carroll and Lloyd White make their comebacks from injury and there is a place for newcomer Phil Joseph in Betts' initial squad.
Former Great Britain international Betts is expecting a tough encounter in a capital and feels there are similarities between the clubs.
"Facing London away from home is a tough game to start the year off with and having somebody of the quality of Craig Gower in your side is always going to make you a force to be reckoned with," he said.
"Last season, there were plenty of similarities between the two clubs, in the sense that we both had a group of players who hadn't played too much together, it took time for us to find our feet and we were both struck down with plenty of injuries over the course of the year.
"As a group, we're a bit more solid and better prepared than we were 12 months ago and I know that London will be feeling exactly the same way, so it should be a great game."
London Broncos: Bailey, Bryant, Channing, Dixon, Dorn, Gower, Howell, Hurst, Kaufusi, Krasniqi, Lee, Lovell, Melling, O'Callaghan, Randall, Robertson, Rodney, Wheeldon, Whitt.
Widnes Vikings: Allen, Briscoe, Cahill, Clarke, Craven, Cross, Dean, Flynn, Gerrard, Hanbury, Isa, Joseph, Leuluai, Marsh, Mellor, O'Carroll, Pickersgill, White, Winterstein.