I enlared the photo and, broke the magnifying glass out. I still couldn't make out the size. I did see the make.
The optimal tire size for a DII (if you want larger tires, obviously) is almost universally 265/75R16 until you've driven one for a while. I still think it's about perfect for most people either way.
That's the magic number. With that size, you get the look and the performance without sacrificing anything else or needing a massive lift. Just about any spring option you'd actually buy will work fine.
Sometimes you have to trim the front of the plastic sills a little bit if you don't have sliders installed, but that's very easy, doesn't require removal, and only takes a couple of minutes. If you ever sell the car, the odds of anyone noticing are slim at best, and you can get replacement sills all day long if you just have to have them.
That's more common now that almost every tire has lugs rolling over the shoulder to the sidewall. Don't let that trimming worry you.
You can buy larger tires and fit them, but most will suggest a three inch lift; and a three inch lift on a DII isn't the same as such a lift on say, a Jeep. Rovers become unnecessarily gigantic
very quickly, and the radius arms start throwing off caster anyway.
A 1.5" to 2.0" lift is essentially the standard, and it's the standard for very good reasons. It's an isolated purchase; you don't have to do much else, and it lets the vehicle remain a DII, so far as overall handling and comfort are concerned. Grab an Old Man Emu HD or equivalent kit to just be done with it.
Cheers,
Kennith