The chancellor admitted, in his newspaper interview, that the government had "patently" failed to get its message across that it understood people's concerns about rising living costs and growing job insecurity.
He said that voters were "pissed off" with Labour's handling of the economy, a key issue at the next election, and said it was "absolutely imperative" that ministers communicated their intentions better.
When asked why he had been so frank, the chancellor told BBC News: "I think it is important that government ministers and particularly me as Chancellor level with people.
"I explained that what is happening to every country in the world, ours included, is that we have a credit crunch the like of which we have not seen for generations.
"We have that at the same time as oil and food prices going up. But I also am clear that the fundamentals of our economy are strong."
He said the current government differed from previous ones because it is prepared to "take action to help the economy and to help people get through this difficult time".
He cited the rescue package provided for Northern Rock and tax rebates due at the end of next month as examples of assistance offered by the government.
Shadow chancellor George Osborne reacts to Alistair Darling's "remarkable" interview
Ministers are expected to announce a package of measures next week to kick-start the moribund housing market.
The chancellor has been criticised for sending contradictory signals over possible measures to assist homebuyers, particularly the prospect of a temporary suspension of stamp duty on home purchases.
In a wide-ranging Guardian interview, Mr Darling said Labour had to rediscover its "zeal" if it wanted to be re-elected for a fourth term.
Mr Darling hinted at tensions within Gordon Brown's Cabinet, saying there were "lots of people who'd like to do my job" and "no doubt, actively doing it", although he appeared to rule out an autumn Cabinet reshuffle.
The chancellor's remarks come after a summer of bad economic news.
House prices are falling at their fastest rate in 18 years, leading to fears of a wave of repossessions.
Mortgage lending has slowed dramatically due to the credit crunch while key indicators have suggested that the economy could be poised to go into recession.
Vince Cable reacts to the Chancellor's assessment of the UK economy
The economy showed no growth in the second quarter of the year while building firms and retailers have laid off thousands of staff amid fears that the economy will deteriorate further.
A member of the Bank of England's Monetary Policy Committee said on Friday that radical action was needed to ensure the crisis did not get worse and warned of a sharp rise in unemployment.
Mr Osborne said: "Who is telling the truth at the top of government?
"The prime minister says the economic situation isn't as bad people think and that Britain is well placed to weather the economic storm but the chancellor says we are at a 60-year low.
"Gordon Brown has briefed out stories that he has an economic recovery plan all worked out, meanwhile the chancellor says the downturn will be more profound and long-lasting than people thought.
"It's not clear whether Alistair Darling meant to tell us the truth about the mess 10 years of a Labour government has left our economy in, but he has certainly let the cat out of the bag."
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