[GeorgeKangas]

The 6809 was 8 bits, in the same way Z80 and 6502 and 6800 were: 8 bit data bus, 16 bit address bus.

It had a few 16 bit instructions: arithmetic on data in registers, or loading/storing a 16 bit register (8 bits at a time). I think the Z80 did as well.

Here's Wikipedia: https://en.wikipedia.org/wiki/Motorola_6809

[jacquesm]

It also had an 8x8 mul with 16 bit result.

[timbit42]

One 16-bit feature doesn't make a CPU where every other feature is 8-bit a 16-bit CPU.