Multi-piece solid golf ball

A multi-piece solid golf ball comprising a core, an envelope layer, an intermediate layer and a cover, the core being formed of a rubber composition as one or more layer, the envelope layer being formed of a resin material as one or more layer and the intermediate layer and the cover each being formed of a resin material as a single layer,

• wherein
• the core has a diameter of from 35.1 to 41.3 mm;
• the ratio (core diameter)/(ball diameter) has a value of at least 0.825;
• the core has a hardness profile in which, letting Cc be the Shore C hardness at a center of the core, Cc+4 be the Shore C hardness 4 mm outward from the core center, Cm be the Shore C hardness at a midpoint M between the core center and a surface of the core, Cm−4 and Cm+4 be the respective Shore C hardnesses at positions 4.0 mm inward and 4.0 mm outward from the midpoint M, Cs be the Shore C hardness at the core surface and Cs−4 be the Shore C hardness 4 mm inward from the core surface and defining the surface areas A to D as follows
• surface area A:
• ½×4×(Cc+4−Cc)
• surface area B:
• ½×4×(Cm−Cm−4)
• surface area C:
• ½×4×(Cm+4−Cm)
• surface area D:
• ½×4×(Cs−Cs−4),
• the ratio (surface area C)/(surface area A) has a value of 0.5 or more and Cs−Cc has a value of 20 or more;
• the center hardness of the core, surface hardness of the core, surface hardness of the sphere obtained by encasing the core with the envelope layer (envelope layer-encased sphere), surface hardness of the sphere obtained by encasing the envelope layer-encased sphere with the intermediate layer (intermediate layer-encased sphere) and surface hardness of the ball have Shore C hardness relationships therebetween which satisfy the following conditions:
• core surface hardness<surface hardness of envelope layer-encased sphere<surface hardness of intermediate layer-encased sphere>ball surface hardness, and (1)
• (surface hardness of envelope layer-encased sphere)−(center hardness of core)≥28;
• (2)
• and the envelope layer, intermediate layer and cover have respective thicknesses which satisfy the following condition:
• cover thickness<intermediate layer thickness (3)
• cover thickness<envelope layer thickness (4)
• envelope layer thickness≥0.8 mm. (5)