It was a fourth win in a row for Slaven Bilic's side in all competitions and extended the club's unbeaten run to eight games.
A memorable season has already produced a first win at Anfield for 63 years and first double over Liverpool since 1964 as well as away wins over Arsenal and Manchester City while Bilic's men have also put Chelsea to the sword at Upton Park.
Their excellent form, attacking prowess - despite missing as many as seven key first team players all at the same time recently - and new found style have made them a surprise package to challenge the top four.
'We've got Payeeeeeeet'
The East Londoners are widely regarded to have done some of the best business in the last two summer transfer windows bringing in the likes of superstar Dimitri Payet for just £10 million, Chiekhou Kouyate, Aaron Cresswell, Pedro Obiang, Angelo Ogbonna, Diafra Sakho, Manuel Lanzini, Michail Antonio and Alex Song.
That's according to the Euro Club Index which is a ranking system of football teams in the highest division of all European countries.
The ECI calculates the ranking based on the sporting results of three consecutive seasons. The relative playing strengths are calculated of all relevant teams within each country on the start date and the relative strengths are calculated of the teams that have represented their country in the UEFA Champions League, UEFA Europa League and UEFA Super Cup.
It also assesses probabilities of different results (win, draw, loss) for football matches in the near future based team performance and squad strength.
And the Hammers have been rewarded by being the biggest climbers in the entire Euro Club Index as they shot up seven places to 64th above the likes of Bordeaux and last season's Europa League finalists Dnipro.
It comes with the club on the brink of their big move to the 54,000 seater Olympic Stadium this summer.
The ECI results give weight to the recent prediction of London Mayor Boris Johnson who said West Ham are the biggest project of their kind in Europe and will change the face of London when they move to Stratford.
"This is just the beginning," Johnson told whufc.com.
"I think people will look back, everyone involved with West Ham, everyone who supports West Ham, I think they will be very proud, actually, that they are part of something that is the biggest economic social regeneration project anywhere in Europe.
“I think West Ham fans are part of something that is going to change the face of London."