Brother claims speeds of 12ppm and 10ppm for black and colour A4 prints, respectively. We saw very similar times to those from the Brother MFCJ6910DW, no surprise, since it uses the same print engine. Our five-page text document gave 6.8ppm, while the 20-page one increased this to 9.1ppm, so not far off the claimed speed. In fast (draft) mode, the printer managed 9.4ppm.
We only saw 6.0ppm from the text and colour graphics document, though, and 3.8 sides per minute when we printed duplex, a standard function of the printer. An A3 version of the text and graphics print took 3mins 25s, the equivalent of 1.5ppm. These speeds are all reasonable, even for an inkjet printer costing over £200.
Printing a copy from the flatbed scanner took 28s for an A4 original and 43s for A3. Using the ADF, the printer managed a five-page document in 1min 32s, which is again a very presentable speed. Although the machine has duplex print, it only has a simplex scanner, so you can produce a two-sided copy from two single-sided originals, but not do a full duplex-to-duplex copy.
15 x 10 cm photo prints vary from 1min 10s to 2mins 2s, but even a full A3 print only took 3mins 38s, so you won't be waiting forever to print photos.
Print quality from the MFC-J6510DW is again much the same as it was from the machine’s bigger sibling. Text print is both fuzzy around the edges and heavy on the page. Colour graphics are bright and registration of black text over colour is accurate. Photographic prints are better than some, with good rendition of different colour tones, though a slight over-red cast.
We managed to find a slightly cheaper source for the ink cartridges, which are available in two yields, than we did when reviewing the earlier machine and these costs can of course be applied to both printers, since the cartridges are identical. We calculate an ISO black page cost of 1.8p and an ISO colour page cost of 5.5p, both of which are very competitive with rivals.
If you need A3 print on a day-to-day basis, then your choices of inkjet all-in-ones are limited. This printer, though feeling a bit flimsily plastic in places, does the things many people will want. A3 print and copy is handled well but, as before, it is plain paper print quality that lets the machine down.