Maybe a very small chicken. Having used a 4 litre oven recently, I bought an 8 litre just because we struggled to roast the meat in it and had to cut it up to fit it in. The 8 litre is a much better size for pot roasts, particularly roasting larger birds, big chickens, ducks etc and will, hold a vast amount (well 8 litres I suppose) of stew. The 6 litre is the same depth as the 4 litre, but slightly bigger diameter, the 8 litre is the same diameter as the 6 litre, but a bit deeper. The main advantage of the 8 litre is that you can cook a good sized roast in it as well as plenty of veg and also ideal for cooking for groups 6 or more people. It's also more versatile for different cooking techniques, putting stones in the bottom etc. That said, I would also like to get one of the 4 litre ovens as it's a very good size for 2-4 people, especially nice for stews and such. The boxed set that Ronnie's does for about £70 is nice, it includes a 4 litre oven I think, a stand for the lid, skillet, griddle, a lid lifter and obviously the nice wooden box to keep it all in. It's expensive compared to the cost of the oven alone, but you do need something to keep your oily, sooty oven away from everything else, the kit is cheaper than buying all the bits separately (and they are all useful) and you cant buy the box on it's own. Now I have an 8 litre, I'm not sure how motivated I am to get another, but if I were, I think I would buy the 4 litre boxed kit from Ronnies. The 4 litre oven is a perfect size for 2 people providing you are not too ambitious with the size of your roasts.
http://www.ronniesunshines.com/inde...n-bushcraft-camping-western-gift-box-set.html
