Lee Johnson's side have lost just six of their last 33 league matches since 1 March - the fewest of any Championship side over the same period
Bristol City are "miles off" their best form despite coming from 2-0 down to beat Hull, says head coach Lee Johnson.
Aden Flint, Bobby Reid and Josh Brownhill all scored in the second half to complete a remarkable 3-2 away win.
It leaves the Robins fifth in the Championship, but Johnson says his side must improve if they want promotion.
"It won't happen if we play like we have for the last 145 minutes, or whatever it is in the last two games," he told BBC Radio Bristol.
"We're miles off at the moment. Yes, we've got very good players and injuries but we've got to do a lot of work.
"It's a win and I'm very excited - but I'm not going to gloss over it, we have to keep working."
Prior to the victory at Hull, the Robins lost 2-1 to Preston to suffer just their third league defeat in 19 games this season.
Johnson believes the key to producing a promotion challenge is to grind out results even when playing poorly.
"In every season - and luckily I've been promoted a few times - you have spells where you're not playing very well," Johnson added.
"If we can produce results when we're not playing very well the confidence grows.
"You maybe have seven or eight games a season where you sparkle properly.
"The other stuff is about doing the ugly bits well, being in a structure and people understanding their role."
The Robins take on seventh-placed Middlesbrough on Saturday before an away trip to third-placed Sheffield United.
Source: bbc.com