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Hi Dj,

According to the System equirements for Autodesk Revit 2019 you can choose between MacBook Pro 13" (2.3GHz Dual-Core Processor, 256GB Storage, 8GB RAM without Touch Bar and Touch ID) for "Minimum: Entry-Level Configuration" and MacBook Pro 15" (2.6GHz 6-Core Processor, 512GB Storage, 16GB RAM with Touch Bar and Touch ID) for "Performance: Large, complex models" configuration.
I think for "Entry-Level" you can even use MacBook Air 13" (advanced configuration with 2.2GHz dual-core Intel Core i7 and 8GB RAM) with external display.
"Entry level" configuration is suitable for AutoCAD in any case.