King of the Desert Land Cruiser 100 

The Land Cruiser 100 can be considered a "sleeper" in the context of off-roading and desert driving, but it's not typically labeled as a "sleeper" in the same way high-performance street cars are. A "sleeper" usually refers to a vehicle that looks unassuming but has much more power or capability than expected.
The Toyota Land Cruiser, especially in regions like the Middle East and parts of Africa, is often referred to as the "King of the Desert" due to its unmatched reliability, durability, and off-road capability. Its ability to handle extreme conditions, including sand dunes, rocky terrains, and harsh climates, has earned it a legendary reputation for desert driving.
The Land Cruiser 100 is already known for being a strong and reliable off-road vehicle, especially in desert environments, but if you've made modifications or it performs beyond what people expect from its appearance, you could definitely call it a "sleeper" in that sense.