The most obvious replacement for your current Jeep would be another Grand Cherokee, as this generation was produced up until 2020 before being replaced, although the current generation was only available in the UK with a diesel engine. The Toyota Land Cruiser is similar to the Grand Cherokee in terms of size and is even more capable off-road, although this too is only available with a diesel engine, as are most SUVs of this size like the Land Rover Discovery 4 and Mercedes-Benz ML. If it has to be petrol, your best options are the spacious and comfortable Volvo XC90, or the vast and luxurious BMW X7, both of which are available with petrol engines.