from what I could find on the net:
Challenger 2000
Technical Specifications
Dimensions
Overall length 19'8" / 6.0m
Beam 8' / 2.44m
Draft 12" / 30.5cm
Deadrise 20°
Weight (dry) 2,000 lbs. / 907kg
Passenger capacity 8 person
Load limit 1,440 lbs. / 653 kg
Water capacity N/A
Fuel capacity 40 US gal. / 151L
Oil Capacity 3 US gal. / 11.4L
Engine
Engine Mercury M² Jet Drive
Type/Displacement 250 hp OptiMax - V6 / 3.0L
240 hp EFI- V6 / 2.5L"
Horsepower 250 hp OptiMax or 240 hp EFI
Fuel System 250 hp OptiMax- 2-stage direct injection
240 hp EFI- Multi-point electronic fuel injection
Lubrication Variable ratio oil injection, gear-driven
Exhaust Power tuned dual-muffler, through-transom
Engine Protection Systems Engine overheat, low oil level, over-rev protection, low battery
Operating Range 250 hp OptiMax 5150-5650 rpm (PCM 555 controlled)
240 hp EFI 5500-6000 rpm
Corrosion Protection XK360 aluminum, multi-step painting, sacrificial anodes
Drive Unit
Jet pump type Mixed flow, high volume
Directional Gate High-thrust, twin aperture, F/N/R
Impeller 7.25" diameter, 4-blade variable pitch stainless steel
Trim System Manual adjustable trim plate
Intake Grate "Hydro-Surge" weedless
Electrical
Starter Electric
Charging System 240 hp EFI 40 amp
Battery 12 volt
Challenger 1800
Technical Specifications
Dimensions
Overall length 17'11" / 5.46m
Beam 7'6" / 2.29m
Draft 12" / 30.5cm
Deadrise 20°
Weight (dry) 1,865 lbs. / 846Kg
Passenger capacity 7 person
Load limit 1,245 lbs. / 565Kg
Water capacity N/A
Fuel capacity 40 US gal. / 151L
Oil Capacity 3 US gal. / 11.4L
Engine
Engine Mercury M² Jet Drive
Type/Displacement V6 / 2.5L
Horsepower 240 hp EFI
Fuel System 240 hp EFI Multi-port injection
Lubrication Variable ratio oil injection, gear-driven
Exhaust Power tuned dual-muffler, through-transom
Engine Protection Systems Engine overheat, Low oil level, Over-rev protection, Low battery
Operating Range 240 hp EFI, 5500-6000 rpm
Corrosion Protection XK360 aluminum, multi-step painting, sacrificial anodes
Drive Unit
Jet pump type Mixed flow, high volume
Directional Gate High-thrust, twin aperture, F/N/RR
Impeller 7.25" diameter, 4-blade variable pitch stainless steel
Trim System Manual adjustable trim plate
Intake Grate "Hydro-Surge" weedless
Electrical
Starter Electric
Charging System 240 hp EFI = 40 amp
Battery 12 volt
seems they list a single engine and not the twin. and the challenger 2000 is longer...