I've looked up some more reliable sources than a Wikipedia page citing an article citing a 1944 table. Predictably, the Wikipedia data aren't trustworthy. Alfred Price's Britain Air Defences 1939-45 tells a rather different story.
For starters, the V-1s launched against Britain were over 10,000, not 8,025. This number is closer to the figure of the flying bombs that actually crossed the British coastline, or were otherwise observed by the defences: 7,488. This isn't surprising given that the table quoted couldn't, as I mentioned, rely on German sources, having been compiled in 1944.
Of these over 10,000 missiles, only 3,531 eluded the defenses; the rest did not reach initial speed, veered off course on their own, suffered other technical problems, or were shot down. Of the 3,531 that did elude the defenses, only 2,419 reached London, and about other 31 reached another target worth of note; the rest did not. This rather puts in perspective the usefulness of these weapons. By "target" I mean a generally built-up area, of course, nothing more specific.
What's even more interesting is that "casualty" in the table quoted of course means both deaths and injuries. By consulting some more discriminating sources, it turns out only 6,184 were killed by the V-1s; the rest were wounded. The British suffered 92,700 civilian losses in the war, most of them to bombing and, very evidently, the overwhelming majority of them to conventional bombing.
Price doesn't give a statistics for houses. Other sources, anyway, offer a similar picture as the ratio of deaths to injuries; destroyed houses being mentioned in the vicinity of 15-18,000. So lumping everything under destroyed/damaged is a bit disingenuous.
We can now reassess the casualty/bomb tonnage rate provided in the table. For starters, the table is inherently wrong; a V-1 weighed about 2.2 tons, so the total tonnage for 8,025 V-1s would be 17,655 tons. This alone reduces the rate to 1.3, and, alone, casts a shadow on the trustworthiness of the source. If in addition we consider that not 8,025, but 10,000 were fired, that ratio goes further down to about 1.
Note that, since the total weight of each V-1 is wrong in the table, it's quite likely the figure concerning fuel is wrong too. This is negligible from a practical POV, but it adds to the final assessment about that table's overall reliability.